Ammonium thiocyanate

  • Thiocyanic acid, ammonium salt
  • Ammonium rhodanide
  • Ammonium sulfocyanate
  • Ammonium sulfocyanide
Formula
NH4SCN
Structure
Description
An aqueous solution of a colorless crystalline solid.
Uses
In matches, double-dyeing fabrics, photography, improving & incr strength of silks weighted with tin salts, in producing grayish-black coating on zn, manufacture transparent artificial resins, thiourea, in pesticides, in determination & detection of small quantities of iron, determination of ag, hg, etc.

Registry Numbers and Inventories.
CAS
1762-95-4
EC (EINECS/ELINCS)
217-175-6
EC Index Number
615-004-00-3
EC Class
harmful
R 20/21/22 32
RTECS
XK7875000
RTECS class
Agricultural Chemical and Pesticide; Human Data
Merck
13,564
Beilstein/Gmelin
3595135
EPA OPP
68200
Swiss Giftliste 1
G-1117
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CH4N2S
Formula mass
76.12
Melting point, °C
150
Decomposition point, °C
170
Vapor pressure, mmHg
7.5 (20 C)
Density
1.305 g/cm3 (20 C)
Solubility in water
1280 g/L

Hazards and Protection.
Storage
Keep away from sources of ignition. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Protection
Eyes: Wear chemical goggles and a face shield if splashing is possible. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Remove all sources of ignition.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Can explode if mixed with lead nitrate. Reacts dangerously with chlorates, nitrates, nitric acid, organic peroxides, oxidizing agents, peroxides, potassium chlorate, and sodium chlorate.
Decomposition
Hydrogen cyanide, nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide, ammonia and/or derivatives.

Fire.
Flash Point,°C
190
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dust can be an explosion hazard when exposed to heat or flame. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Fire potential
Solid may be combustible; solution is not flammable.
Combustion products
Decomposes to form ammonia, hydrogen sulfide, and hydrogen cyanide.
Health
2
 
Flammability
1
 
 
Reactivity
1
 

Health.
Poison_Class
3
Exposure effects
Chronic exposure may cause thyroid damage: thyroid enlargement, decrease in metabolic rate, and hypothyroidism.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause agitation, delerium, convulsions, and muscle
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation. Chronic exposure may cause thyroid damage: thyroid enlargement, decrease in metabolic rate, and hypothyroidism.
   Eyes
May cause moderate eye irritation.

First aid
 
   Ingestion
Induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
USCG CHRIS Code
AMT
 
HS Code
2838 00 00
 
Std. Transport #
4966744
 
IMO Pollution Category
(C ACS)
IMO Hazard code
(P ACS)