Cobalt(II) thiocyanate

Cobalt(II) thiocyanate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.019.234 Edit this at Wikidata
EC Number
  • 221-156-8
UNII
  • InChI=1S/2CHNS.Co/c2*2-1-3;/h2*3H;/q;;+2/p-2 ☒N
    Key: INDBQWVYFLTCFF-UHFFFAOYSA-L ☒N
  • InChI=1/2CHNS.Co/c2*2-1-3;/h2*3H;/q;;+2/p-2
    Key: INDBQWVYFLTCFF-NUQVWONBAI
  • C(#N)[S-].C(#N)[S-].[Co+2]
Properties
C2CoN2S2
Molar mass 175.098 g/mol
Density 2.484 g/cm3
+11,090·10−6 cm3/mol
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
H302, H312, H332, H410
P261, P264, P270, P271, P273, P280, P301+P312, P302+P352, P304+P312, P304+P340, P312, P322, P330, P363, P391, P501
Safety data sheet (SDS) External MSDS
Related compounds
Other anions
 Cobalt(II) cyanate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN)2.[1] The anhydrous compound is a coordination polymer with a layered structure. The trihydrate, Co(SCN)2(H2O)3, is a isothiocyanate complex used in the cobalt thiocyanate test (or Scott test) for detecting cocaine. The test has been responsible for widespread false positives and false convictions.[2][3]

  1. ^ Shurdha, Endrit; Lapidus, Saul H.; Stephens, Peter W.; Moore, Curtis E.; Rheingold, Arnold L.; Miller, Joel S. (2012-09-17). "Extended Network Thiocyanate- and Tetracyanoethanide-Based First-Row Transition Metal Complexes". Inorganic Chemistry. 51 (18): 9655–9665. doi:10.1021/ic300804y. ISSN 0020-1669. PMID 22928927.
  2. ^ Ryan Gabrielson; Topher Sanders (July 7, 2016). "Busted: Tens of thousands of people every year are sent to jail based on the results of a $2 roadside drug test. Widespread evidence shows that these tests routinely produce false positives. Why are police departments and prosecutors still using them?". ProPublica.
  3. ^ Ryan Gabrielson (July 11, 2016). "'No Field Test is Fail Safe': Meet the Chemist Behind Houston's Police Drug Kits". ProPublica.