Kaolin

  • Bolus
  • China clay
  • Porcelain clay
Formula
H2Al2O8Si2.H2O
Description
Light beige powder.
Uses
Manufacture porcelain, pottery, bricks, portland cement, ultramarine, color lakes, refractory mortar, plaster material, filler for paper, electric & heat insulators, clarifying liquids, manufacture drying & emollient agent, gi adsorbent, (vet): poultice, topical & gi adsorbent.

Registry Numbers and Inventories.
CAS
1332-58-7
EC (EINECS/ELINCS)
310-194-1
RTECS
GF1670500
RTECS class
Reproductive Effector
Beilstein/Gmelin
NA
EPA OPP
100104
Swiss Giftliste 1
G-8068
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H2Al2O8Si2.H2O
Formula mass
258.16
Melting point, °C
1760
Density
0.5 g/cm3
Solubility in water
Insoluble

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. No special precautions indicated.
Handling
Wash thoroughly after handling. Wash hands before eating. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. 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
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong acids, strong bases, strong oxidizing agents.
Decomposition
Irritating and toxic fumes and gases, silicon oxide, aluminum oxide.

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. Use extinguishing media appropriate to the surrounding fire. Substance is noncombustible. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp) OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
Poison_Class
-
Exposure effects
Chronic inhalation can cause pneumoconiosis.
   Ingestion
Ingestion of large amounts may cause gastrointestinal irritation. Low hazard for usual industrial handling. The toxicological properties of this substance have not been fully investigated.
   Inhalation
May cause respiratory tract irritation. Low hazard for usual industrial handling. The toxicological properties of this substance have not been fully investigated. When inhaled as a dust or fume, may cause benign pneumoconiosis.
   Skin
Dust may cause mechanical irritation. The toxicological properties of this material have not been fully investigated.
   Eyes
Dust may cause mechanical irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. 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. Wash clothing before reuse.
   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.
USCG CHRIS Code
KLS
 
43 Misc. water solutions
IMO Chemical Code
18
IMO Pollution Category
III