Potassium thiocyanate

  • Potassium Isothiocyanate
Formula
KSCN
Structure
Description
Colorless to white, odorless crystals.
Uses
Production of artificial mustard oil, fungicide, insecticide.

Registry Numbers and Inventories.
CAS
333-20-0
EC (EINECS/ELINCS)
206-370-1
EC Index Number
615-004-00-3
EC Class
harmful
R 20/21/22 32
RTECS
XL1925000
RTECS class
Agricultural Chemical and Pesticide; Drug; Mutagen; Reproductive Effector; Human Data
Merck
12,7866
Beilstein/Gmelin
21362 (G)
EPA OPP
68201
Swiss Giftliste 1
G-2321
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CKNS
Formula mass
97.18
Melting point, °C
175
Boiling point, °C
500
Vapor density (air=1)
N/R
Density
1.61 g/cm3
Solubility in water
71 g/L (25 C)
Refractive index
1.558 (174 C)
Heat of fusion
9.42 kJ/mol

Hazards and Protection.
Storage
Keep from contact with oxidizing materials. Keep away from acids. Store in a cool, dry area away from incompatible substances.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with skin and eyes. Keep container tightly closed.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective clothing to minimize contact with skin. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
A NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Acids, methanoic acid, oxalic acid), strong oxidizing agents.
Decomposition
Carbon monoxide, oxides of nitrogen, oxides of sulfur, carbon dioxide, cyanide fumes.

Fire.
Flash Point,°C
500
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA TWA: 5 mg/m3 as CN
Poison_Class
3
Exposure effects
Effects may be delayed.
   Ingestion
May cause irritation of the digestive tract. May be harmful if swallowed.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
Causes skin irritation. May be absorbed through the skin in harmful amounts.
   Eyes
Causes eye irritation. Poisoning can cause swelling of the eyelids, delerium, blurred vision, and hallucinations.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid. May cause irritation of the digestive tract and possible burns.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2838 00 00