Silver sulfide

Formula
Ag2S
Structure
Description
gray-black orthorhombic powder
Uses
Substance is used in ceramics.

Registry Numbers and Inventories.
CAS
21548-73-2
EC (EINECS/ELINCS)
244-438-2
Merck
12,8677
Beilstein/Gmelin
9258 (G)
Swiss Giftliste 1
G-8911
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Ag2S
Formula mass
247.79
Melting point, °C
842
Density
7.23 g/cm3 (25 C)
Viscosity
0.033 P (1250 C)
Thermal expansion
1.3E-5/K (30 C)
Heat of fusion
14.1 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
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 gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
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
Clean up spills immediately, using the appropriate protective equipment.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Irritating and toxic fumes and gases.

Fire.
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: Use agent most appropriate to extinguish fire.

Health.
Poison_Class
5
Exposure effects
   Ingestion
The toxicological properties of this substance have not been fully investigated.
   Inhalation
The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation. No information regarding skin irritation and other potential effects was found.
   Eyes
May cause eye irritation. No information regarding eye irritation and other potential effects was found.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.