Talc

Formula
3MgO.4SiO2.H2O
Description
Odorless, white powder. Crude talcs range in color from white to green, grey and brown.
Uses
Additive to clay in ceramic manufacture & paper coatings, for roofing materials.

Registry Numbers and Inventories.
CAS
14807-96-6
EC (EINECS/ELINCS)
238-877-9
RTECS
WW2710000
RTECS class
Tumorigen; Natural Product; Primary Irritant
Beilstein/Gmelin
12537 (G)
RCRA
D009
Swiss Giftliste 1
G-6939
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
H2Mg3Si4O12
Formula mass
379.27
Melting point, °C
800
Vapor density (air=1)
5.7
Density
2.58-2.83 g/cm3 (20 C)
Solubility in water
Insoluble

Hazards and Protection.
Storage
Store in a cool, dry place. Keep container closed when not in use. No special precautions indicated.
D2A
Handling
Wash hands before eating. Use only in a well ventilated area. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation.
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. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
14
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Aluminum foil is unsuitable as a packing material in contact with mercury(ii)salts in presence of moisture, when vigorous amalgamation ensues. Avoid contact with strong oxidizers such as chlorine.
Decomposition
Irritating and toxic fumes and gases, silicon oxide.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Material will not burn. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Substance is nonflammable; use agent most appropriate to extinguish surrounding fire.
Fire potential
This material is nonflammable
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: ppm; 2 mg/m3 as TWA (ACGIH 1993-1994). OSHA PEL: TWA 20 mppcf NIOSH REL: TWA 2 mg/m3 (resp) NIOSH IDLH: 1000 mg/m3
Poison_Class
-
Exposure effects
Chronic inhalation can cause pneumoconiosis.
   Ingestion
No hazard expected in normal industrial use. Ingestion of large amounts may cause gastrointestinal irritation. Low hazard for usual industrial handling.
   Inhalation
Dust is irritating to the respiratory tract. Low hazard for usual industrial handling.
   Skin
May cause mild skin irritation.
   Eyes
Dust may cause mechanical irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Wash mouth out with water. Get medical aid if irritation or symptoms occur.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   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. If irritation develops, get medical aid.

Transport.
HS Code
2526 20 00