Ammonium thiocyanate CAS 1762-95-4

CAS:1762-95-4
MF:CH4N2S
EINECS:217-175-6
Purity:99%min
Other Names:Ammonium thiocyanate

CAS: 1762-95-4

MF: CH4N2S

What is of Ammonium thiocyanate CAS 1762-95-4?

ammonium thiocyanate: A colourless, soluble crystalline compound,NH₄NCS. It is made by theaction of hydrogen cyanide on ammoniumsulphide or from ammoniaand carbon disulphide in ethanol. Onheating, it turns into its isomerthiourea, SC(NH₂)₂. Its solutions givea characteristic blood-red colour withiron(III) compounds and so are employedas a test for ferric iron.

Specification

Index Name	Top grade	First Grade	Qualified products
NH4SCN (dry)≥%	99.0	98.0	97.0
Appearance of solution	clear
PH value	4.5-6.0
Chloride,%≤	0.01	0.01	0.02
Sulfate,%≤	0.01	0.01	0.03

Usage

Colorless deliquescent crystals made by boiling an aqueous solution of ammonium cyanide with sulfur or polysulfides. It must be kept in a well-sealed container. The principal use for ammonium thiocyanate was in gold-toning formulas, but it was also used in a 5 percent solution to dissolve gelatin in overexposed carbon prints.