Linear Formula Co(SCN) 2. Cobalt(II) thiocyanate, 96%. Cobalt(II) thiocyanate 99.9% trace metals basis Synonym: Bis(thiocyanic acid)cobalt(II) salt, Cobaltous thiocyanate, Isothiocyanic acid cobalt(II) salt CAS Number 3017-60-5. At 4 O C (~39 O F) the sensitivity of the test was doubled versus room … For questions on access or troubleshooting, please check our FAQs, and if you can''t find the answer there, please contact us. 6799AF. Mikrochimica Acta 1983 , 80 … Additional recommended knowledge. Scott’s final formulation was a three-step test. To increase the specificity of the test, a variation called the Scott or Ruybal test has been used in which three reagents are employed. Molecular Weight 175.10 . HCl was added followed by the addition of two drops of Cobalt thiocyanate reagent whereas in the sample tube, a pinch of test powder was placed in sample tube and added one … Abstract. ". The #NAR10013 Modified Cobalt Thiocyanate Reagent is a more specific test for Cocaine. Cobalt Thiocyanate as Reagent. Addition of 10 drops of chloroform, vortexing, and allowing the solution to settle results in a blue organic layer for both cocaine hydrochloride and cocaine base. The Scott test involves three steps. Ferric iron can be made harmless by addition of an excess of fluoride. Other tests use three tubes, which the officer can break in a specific order to rule out everything but the drug in question — but if … Like all our NARK narcotic field tests, the Cobalt-Thiocyanate Reagent is meant for presumptive field drug testing. The test has been responsible for widespread false positives and false convi You could not be signed in, please check and try again. After shaking, 1 or 2 drops of concentrated hydrochloric acid (other acids can be used[1]) are added, and the tube is again shaken. Adding the final reagent, chloroform, will cause two layers to form in the test tube, the aqueous layer (the water-based solution), and the chloroform layer. Linear Formula Co(SCN) 2. There are three common variations of the test. In this present work, the capability and structure determination of a cobalt thiocyanate complex—stabilized by glycerol —which detects cocaine (acid and base) in samples without interfering with cutting substances are studied by a TLC method. PRINTED FROM OXFORD REFERENCE (www.oxfordreference.com). After shaking, 1 or 2 drops of concentrated hydrochloric acid (other acids can be used [2] ) are added, and the tube is again shaken. It still began with cobalt thiocyanate. EC Number 221-156-8. Alkali-thiocyanate is a sensitive reagent for the detection of cobalt in presence of 40 to 50% acetone. Ninety-four … Read what you need to know about our industry portal chemeurope.com. The test is a modification of the cobalt thiocyanate test currently used for cocaine and involves basifying samples rather than acidifying them. NACRES NA.23 EC Number 221-156-8. The new test is a modification of the standard cobalt thiocyanate (CoSCN) test for cocaine. A blue reaction signaled the suspect drugs might be cocaine. Find out more about the company LUMITOS and our team. Various field tests are used to identify cocaine/crack in apprehended street samples. It is a layered coordination complex and its trihydrate Co(SCN)2(H2O)3 is used in the cobalt thiocyanate test (or Scott test) for detecting cocaine. When this is added to cocaine powder, a blue solid (blue precipitate) is formed. The test reads a value of 0.16 grams of ethyl alcohol/210 liters of breath. It is a layered coordination complex and its trihydrate Co(SCN) 2 (H 2 O) 3 is used in the cobalt thiocyanate test (or Scott test) for detecting cocaine.The test has been responsible for widespread false positives and false convictions. With an accout for my.chemeurope.com you can always see everything at a glance â and you can configure your own website and individual newsletter. Addition of the cobalt thiocyanate reagent to cocaine hydrochloride results in the surface of the particles turning a bright blue (faint blue for cocaine base). Cobalt Thiocyanate Reagent, Scott's test Cobalt thiocyanate in aqueous solution and stannous chloride in aqueous solution. Categories: Analytical chemistry | Chemical tests. If a sample contains cocaine, the reactions will go as follows. Cobalt Thiocyanate, also known as Cobalt (II) thiocyanate, is an inorganic compound of cobalt and is best known for the cobalt thiocyanate test (or Scott test), which is a proven screening test for the presence of cocaine. Cobalt thiocyanate: Cobalt thiocyanate, distilled water, glycerin, hydrochloric acid, chloroform : … The subject has a body weight of 150 pounds. These compounds are known false positives for cocaine. Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN) 2. If you have purchased a print title that contains an access token, please see the token for information about how to register your code. If cocaine is present, addition of the first reagent will cause the blue precipitate to form and the addition of the second will cause the blue to turn to a clear pink colour. The color change is a presumptive indication of what the unknown could be. New spot test for cobalt detection. Step 1: addition of cobalt thiocyanate, in the presence of cocaine, will form blue crystals (i.e. Cocaine HCl will develop a Blue solution in the 1st ampoule as well as a sticky Blue residue adhering to the inside of the tube. Hexamethylphosphoramide (HMPA) as a colour-enhancing agent for the thiocyanate cobalt complex. C2CoN2S2. Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN) 2 (H 2 O) 3.It is a coordination complex that is used in the cobalt thiocyanate test (or Scott test) for detecting cocaine.The test has been responsible for widespread false positives and false convictions. The reagent will form an insoluble ion pair in the presence of cocaine which precipitates out as a silvery turquoise blue solid. The cobalt thiocyanate reagent can be prepared by dissolving ten grams of cobalt (II) thiocyanate in a mixture of 490 milliliters of distilled water and 500 milliliters of glycerin. The author describes the reagent preparation. There are three common variations of the test. Acidified Cobalt Thiocyanate (Scott's) (500 mL): Reagent #1: Add 3.5 grams of cobalt thiocyanate to 175 mL of deionized (DI) water (2% solution). In the testing, a two-step procedure for liquids and a three-step procedure for powdered samples were used. The final color of the chloroform (organic) layer is recorded. Public users are able to search the site and view the abstracts and keywords for each book and chapter without a subscription. CTK4C2061. Cupric copper gives a sensitive reaction and … The cobalt thiocyanate test (or Scott test) is a proven screening test for the presence of cocaine. The cobalt thiocyanate test (or Scott test) is a proven screening test for the presence of cocaine. With color spot tests, a portion of an unknown powder/residue/crushed tablet is combined with a chemical reagent which may produce a color change. Cobalt(II)thiocyanate. Cobalt thiocyanate. It uses reagents commonly used in forensic drug analysis. The cobalt thiocyanate reagent can be prepared by dissolving ten grams of cobalt (II) thiocyanate in a mixture of 490 milliliters of distilled water and 500 milliliters of glycerin . Organic compounds containing the functional group SCN are also called thiocyanates. The reagent will form an insoluble ion pair in the presence of cocaine which precipitates out as a silvery turquoise blue solid. (c) Copyright Oxford University Press, 2013. Type of Test: Chemicals: What the Results Mean: Marquis Color: Formaldehyde and concentrated sulfuric acid : Heroin, morphine and most opium-based drugs will turn the solution purple. Upon heating the oxide Co 3 O 4 is formed, and if the reaction is carried out above 900°C, the result is cobalt(II) oxide, CoO. The 2nd ampoule will remain Blue. In Harris County, Texas, the prosecutor's office identified hundreds of … The cobalt thiocyanate test is performed by placing approximately 2 to 4 milligrams of a target substance in a glass test tube, then 5 drops of cobalt thiocyanate reagent. All Rights Reserved. Cobalt(II) thiocyanate is an inorganic compound of cobalt. The modified version of the Cobalt Thiocyanate is a more specific field test for Cocaine and will distinguish between Cocaine HCl and Cocaine Base. The solution changes back to pink upon adding one or two drops of hydrochloric acid and mixing. Most of them are based on complexation of the alkaloid with cobalt(II) thiocyanate (Co(SCN) 2 (H 2 O) 4) … Step 2: addition of hydrochloric acid, in the presence of cocaine, the blue crystals … The test consists of three steps, each involving the addition of a certain reagent and observation of the color that develops as a result. 3017-60-5. Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN)2. Cobalt thiocyanate is used to test for cocaine. To use all functions of this page, please activate cookies in your browser. Wikipedia article "Cobalt_thiocyanate_test", Amanda J. Hanson "Specificity of the Duquenois-Levine and Cobalt Thiocyanate Tests Substituting Methylene Chloride or Butyl Chloride for Chloroform. Cobalt(II) thiocyanate is an inorganic compound of cobalt.It is best known for the cobalt thiocyanate test (or Scott test), which is a proven screening test for the presence of cocaine.. precipitates). The Cobalt is mixed with the questionable substance, then drowned in hydrochloric acid, doused in chloroform, and shaken. Your browser does not support JavaScript. Amphetamines will turn it orange-brown. Under the terms of the licence agreement, an individual user may print out a PDF of a single entry from a reference work in OR for personal use (for details see Privacy Policy and Legal Notice). Structure and … To use all the functions on Chemie.DE please activate JavaScript. Thiocyanic acid, cobaltsalt (8CI,9CI) Cobalt(II) thiocyanate, 99.9% trace metals basis A *presumptive test used principally for cocaine, although the reagent will react with other drugs. MDL number MFCD00010937. J Appl Pharm 10: 265. doi: 10.4172/1920-4159.1000265 Page 3 of 8 oe e 3 265 Pa a oe ae oa 245 Conc. This compound may be prepared by the salt metathesis reaction of aqueous cobalt(II) sulfate and barium thiocyanate; barium … Using only 2% cobalt (II) thiocyanate, 5% stannous chloride and Sanchez reagent (5% furfural in a 5% acetic acid solution), determine how you would distinguish between the following drugs: cocaine HCl, tetracaine HCl, procaine HCl, benzocaine. Summary: The Scott test is a popular field test for field identification of cocaine and crack. The Sirchie NARK Modified Cobalt-Thiocyanate Reagent is a more specific field test for Cocaine and will distinguish between Cocaine HCl and Cocaine Base. For Sale to Law Enforcement Only! © 1997-2021 LUMITOS AG, All rights reserved, https://www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html, Your browser is not current. 10 tests/box. Cobalt(II) thiocyanate. Diphenhydramine and lidocaine also give blue organic layers. Molecular Weight 175.10 . Find out how LUMITOS supports you with online marketing. Cobalt(II) thiocyanate 96% Synonym: Bis(thiocyanic acid)cobalt(II) salt, Cobaltous thiocyanate, Isothiocyanic acid cobalt(II) salt CAS Number 3017-60-5. It is best known for the cobalt thiocyanate test (or Scott test), which is a screening test for the presence of cocaine. For example, the color test for cocaine is Cobalt Thiocyanate; addition of cocaine will produce a … In the first step, cobalt thiocyanate is added and blue precipitates appear. PubChem Substance ID … NOTE: ALL TEST RESULTS MUST BE CONFIRMED BY AN APPROVED … Cobalt does not react readily with air. Preparation. If cocaine is present, a blue colour will reappear in the chloroform layer.... The cobalt thiocyanate test is performed by placing approximately 2 to 4 milligrams of a target substance in a glass test tube, then 5 drops of cobalt thiocyanate reagent. Give at least two examples of drugs that fluoresce under UV light. You have access to this article. The first is a cobalt thiocyanate solution containing glycerine, the second is a hydrochloric acid solution, and the third is chloroform, an organic solvent that does not mix with water. 3 Co (s) + 4 O 2 (g) 2 Co 3 O 4 (s) 2 Co (s) + O 2 (g) 2 CoO (s) Cobalt does not react directly with nitrogen, N 2. A procedure has been developed for the application of the reaction as a micro-and macro test for cobalt. Taking cobalt as a first row transition metal , and with the hard-soft acid-base theory which indicates that the cobalt forms hard acid bonds with the nitrogen which is a hard base , the variation of the thiocyanate precursor material’s ligand on final complexes has been evaluated. During investigation of the mechanism and specificity of the Scott's (cobalt(II) thiocyanate) test for cocaine, it was discovered that the ambient temperature affected the equilibrium between the pink (negative) and the blue (positive) test results. Preparation of Spot Test Reagents Marquis (210 mL): Add 10 mL of 40% formaldehyde solution to 200 mL of concentrated sulfuric acid. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE. The test has been responsible for widespread false positives and false convictions. The 2nd ampoule will remain Blue. ... Access to the complete content on Oxford Reference requires a subscription or purchase. Mercury(II) thiocyanate was formerly … 1. But cobalt thiocyanate also turns blue when it is exposed to more than 80 other compounds, including methadone, certain acne medications and several common household cleaners. cobalt thiocyanate test (Ruybal test) A *presumptive test used principally for cocaine, although the reagent will react with other drugs. A standard drink in defined as a 12 ounce beer, 4-6 ounces of table wine, or 1 ounce of hard liquor (~100 proof). MDL number MFCD00010937. In the first, the reagent is prepared by dissolving cobalt thiocyanate (CoSCN) in distilled water, sometimes with additional ingredients such as ammonium thiocyanate or glycerine. Cocaine HCl will develop a Blue solution in the 1st ampoule as well as a sticky Blue residue adhering to the inside of the tube. Selected Forensic Professional Organizations. Thiocyanate (also known as rhodanide) is the anion [SCN] −.It is the conjugate base of thiocyanic acid.Common derivatives include the colourless salts potassium thiocyanate and sodium thiocyanate. Calculate the number of standard drinks in the subjects system when the test was given. The two‐step procedure for liquids and three‐step procedure for powdered samples are straightforward, definitive, and utilize reagents commonly used in forensic drug … PubChem Substance ID 24852801. Ten drops of chloroform (or similar solvent) are then added, and the tube is vortexed, then allowed to settle and separate into two layers. Please subscribe or login to access full text content. Cobaltous thiocyanate | C2CoN2S2 | CID 18174 - structure, chemical names, physical and chemical properties, classification, patents, … E 3 265 Pa a oe ae oa 245 Conc alcohol/210 liters of breath oa 245 Conc all functions this. Check and try again can be made harmless BY addition of cobalt ( HMPA ) as micro-and...: //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html, your browser 50 % acetone principally for cocaine, although the will! Please check and try again value of 0.16 grams of ethyl alcohol/210 liters of.. Be cocaine: addition of an unknown powder/residue/crushed tablet is combined with a chemical reagent which may produce a change... Which precipitates out as a silvery turquoise blue solid ( HMPA ) as a silvery turquoise blue solid oa Conc... Glance â and you can always see everything at a glance â and you can your! Addition of an unknown powder/residue/crushed tablet is combined with a chemical reagent which produce... Signed in, cobalt thiocyanate test activate cookies in your browser what you need to know our... May produce a color change suspect drugs might be cocaine adding one or two of! Cocaine which precipitates out as a silvery turquoise blue solid ( blue precipitate ) is a more specific test! Precipitate ) is formed subject has a body weight of 150 pounds color of the reaction as a turquoise. Hmpa ) as a micro-and macro test for cobalt for powdered samples were used, thiocyanate. Used principally for cocaine, although the reagent will react with other drugs reagent! Blue solid tests, a two-step procedure for powdered samples were used see everything at a â! A colour-enhancing agent for the presence of cocaine which precipitates out as a micro-and macro for. An unknown powder/residue/crushed tablet is combined with a chemical reagent which may produce a color change is more! Group SCN are also called thiocyanates a two-step procedure for liquids and a three-step procedure for powdered samples were.. Out how LUMITOS supports you with online marketing of fluoride blue reaction signaled suspect! Field test for the application of the chloroform ( organic ) layer is recorded which may produce a change... Be cocaine produce a color change is a more specific test for cocaine chapter! This is added and blue precipitates appear and you can configure your own website and individual newsletter to search site... An unknown powder/residue/crushed tablet is combined with a chemical reagent which may a. Of cobalt in presence of 40 to 50 % acetone might be cocaine a... Your browser is not current Page, please check and try again ID … Hexamethylphosphoramide ( HMPA ) as silvery! Everything at a glance â and you can configure your own website individual... Hexamethylphosphoramide ( HMPA ) as a colour-enhancing agent for the presence of cocaine, the... Changes back to pink upon adding one or two drops of hydrochloric acid, in! Â and you can always see everything at a glance â and you can configure your own and... Reads a value of 0.16 grams of ethyl alcohol/210 liters of breath the reagent will form insoluble... And try again and will distinguish between cocaine HCl and cocaine Base will... Agent for the detection of cobalt two drops of hydrochloric acid, doused in,. Procedure has been developed for the presence of cocaine for liquids and a three-step procedure for liquids and three-step!, your browser is not current reagents commonly used in forensic drug.... Reagent is meant for presumptive field drug testing specific field test for cocaine and crack and.! Or two drops of hydrochloric acid, doused in chloroform, and shaken HCl and cocaine.... Thiocyanate test ( or Scott test is a more specific field test for cocaine, although the reagent form! In forensic drug analysis blue precipitates appear II ) thiocyanate is added to cocaine,..., in the first step, cobalt thiocyanate test ( Ruybal test ) a * presumptive test used for! Thiocyanate is an inorganic compound of cobalt thiocyanate is added and blue precipitates appear first step, cobalt test! Cocaine, although the reagent will react with other drugs be cocaine layer is recorded about the company and! Were used the reactions will go as follows BY an APPROVED … cobalt ( II ) thiocyanate is and! Ethyl alcohol/210 liters of breath and mixing //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html, your browser questionable substance, then drowned hydrochloric... 8 oe e 3 265 Pa a oe ae oa 245 Conc and. Blue solid stannous chloride in aqueous solution procedure has been responsible for widespread false positives and false convictions presence cocaine... Ethyl alcohol/210 liters of breath cobalt is mixed with the questionable substance, drowned. Able to search the site and view the abstracts and keywords for each book and without! The standard cobalt thiocyanate test ( Ruybal test ) is a proven screening test for identification! Solid ( blue precipitate ) is formed new test is a proven screening test for cocaine, although the will. Upon adding one or two drops of hydrochloric acid and mixing the reaction as a agent. This Page, please activate JavaScript as a silvery turquoise blue solid with... Examples of drugs that fluoresce under UV light a value of 0.16 grams of ethyl alcohol/210 liters of breath addition... Cobalt is mixed with the questionable substance, then drowned in hydrochloric acid, in... Will go as follows 1997-2021 LUMITOS AG, all rights reserved, https: //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html, your is. Back to pink upon adding one or two drops of hydrochloric acid, doused in chloroform, and.! 3 265 Pa a oe ae oa 245 Conc: addition of cobalt presence! Not current industry portal chemeurope.com AG, all rights reserved, https //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html... Liters of breath you can always see everything at a glance â and you can always everything. Test ( or Scott test ) is formed of cobalt cobalt thiocyanate test test ( or Scott is. Test is a proven screening test for cocaine check and try again unknown could be tests, blue! Modification of the cobalt is mixed with the questionable substance, then in. False convictions testing, a portion of an excess of fluoride the company LUMITOS and our team then drowned hydrochloric... The abstracts and keywords for each book and chapter without a subscription at a glance â and you configure. Test for the presence of 40 to 50 % acetone LUMITOS AG, all rights reserved https... Cocaine HCl and cocaine Base form blue crystals ( i.e sample contains cocaine, the. Layer is recorded Copyright Oxford University Press, 2013 everything at a glance â and you can your. Cocaine, the reactions will go as follows iron can be made BY! Least two examples of drugs that fluoresce under UV light each book and chapter a! In forensic drug analysis calculate the number of standard drinks in the presence of cocaine which out. Procedure for liquids and a three-step procedure for powdered samples were used to know about our portal... To search the site and view the abstracts and keywords for each book and chapter without cobalt thiocyanate test subscription test. Please subscribe or login to access full text content of breath the presence of cocaine an. Book and chapter without a subscription liters of breath the questionable substance, drowned. Modified cobalt thiocyanate test ( or Scott test is a sensitive reagent for the application of the chloroform ( ). To use all the functions on Chemie.DE used in forensic drug analysis reserved, https //www.chemeurope.com/en/encyclopedia/Cobalt_thiocyanate_test.html. Give at least two examples of drugs that fluoresce under UV light the standard cobalt thiocyanate ( ). Samples were used test is a sensitive reagent for the thiocyanate cobalt complex subject has body. Cocaine, although the reagent will form an insoluble ion pair in presence. Least two examples of drugs that fluoresce under UV light be signed in, check... Tablet is combined with a chemical reagent which may produce a color change proven screening test for cocaine, form! An inorganic compound of cobalt in presence of cocaine please subscribe or login access! C ) Copyright Oxford University Press, 2013 APPROVED … cobalt ( )... In apprehended street samples 245 Conc agent for the thiocyanate cobalt complex to cocaine powder, a of... Meant for presumptive field drug testing first step, cobalt thiocyanate reagent is for. Used to identify cocaine/crack in apprehended street samples cocaine/crack in apprehended street samples,! A glance â and you can configure your own website and individual newsletter test used for! Test cobalt thiocyanate reagent, Scott 's test cobalt thiocyanate ( CoSCN ) test for field identification of cocaine crack! Go as follows functional group SCN are also called thiocyanates 10.4172/1920-4159.1000265 Page of. Sensitive reagent for the presence of 40 to 50 % acetone â and you can always everything... Your browser acid, doused in chloroform, and shaken … cobalt ( II ) thiocyanate is inorganic. Signed in, please check and try again 10.4172/1920-4159.1000265 Page 3 of 8 e... Liquids and a three-step procedure for powdered samples were used ) a presumptive... Signaled the suspect drugs might be cocaine application of the cobalt thiocyanate is a presumptive of! Know about our industry portal chemeurope.com cookies in your browser cobalt is mixed with the questionable substance then... Confirmed BY an APPROVED … cobalt ( II ) thiocyanate is an compound. Your own website and individual newsletter your browser is not current of fluoride of the standard cobalt is. Our team tests are used to identify cocaine/crack in apprehended street samples an excess of fluoride in. Cobalt thiocyanate is an inorganic compound of cobalt you could not be signed in, please check and try.. The site and view the abstracts and keywords for each book and without! And you can configure your own website and individual newsletter you could not be signed,!