Antimony trioxide

  • Antimony white
  • Flowers of antimony
  • Valentinite
  • Antimony(III) oxide
  • Antimony sesquioxide
  • Diantimony trioxide
Formula
Sb2O3
Structure
Description
Antimony trioxide is a white crystalline solid.
Uses
Manufacture of tartar emetic, as paintermediate pigment, in enamels and glasses, as mordant, in flame-proofing canvas.

Registry Numbers and Inventories.
CAS
1309-64-4
EC (EINECS/ELINCS)
215-175-0
EC Index Number
051-005-00-X
EC Class
Carcinogenic Category 3
S 22 36/37
RTECS
CC5650000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Primary Irritant
UN (DOT)
9201
Merck
12,752
Beilstein/Gmelin
9554 (G)
Swiss Giftliste 1
G-4147
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
O3Sb2
Formula mass
291.50
Melting point, °C
654
Boiling point, °C
1425
Vapor pressure, mmHg
10 (670 C)
Odor Threshold Odor threshold Odorless
Density
5.2 g/cm3 (20 C)
Solubility in water
Insoluble
Refractive index
1.67 - 2.06
Dielectric constant
12.8
Heat of fusion
56.4 kJ/mol
Heat of vaporization
74.5 kJ/mol

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid contact with heat, sparks and flame. 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 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. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation.
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Incompatible with bromine trifluoride, acid, oxidizers, halogenated agents, and chlorinated rubber at high temperatures.
Decomposition
Irritating and toxic fumes and gases, antimony/antimony oxides.

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 water spray to keep fire-exposed containers cool. May polymerize explosively when involved in a fire. Containers may explode when heated. Combustible material; even though it may take some effort to ignite. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog or regular foam. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Nonflammable.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV (as Sb): ppm; 0.5 mg/m3 (as TWA) (ACGIH 1991-1992).
Carcinogin
I-2B, CP65
Poison_Class
4
Exposure effects
Possible cancer hazard based on tests with laboratory animals. Prolonged inhalation may cause respiratory tract inflammation and lung damage. Prolonged or repeated skin contact may cause dermatitis. May cause chronic heart disease due to effects on the heart muscle.
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May cause slow pulse, low blood pressure, bloody stool, shallow breathing, coma, convulsions, and possible death.
   Inhalation
Causes respiratory tract irritation. Inhalation of fumes may cause metal fume fever, which is characterized by flu-like symptoms with metallic taste, fever, chills, cough, weakness, chest pain, muscle pain and increased white blood cell count.
   Skin
Causes skin irritation. Repeated or prolonged skin contact may cause antimony measles characterized by itchy papules and pustules around the sweat and fat glands.
   Eyes
Contact produces irritation, tearing, and burning pain. May cause conjunctivitis.

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 breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. 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.
UN number
9201
Response guide
Hazard class
6.1
USCG CHRIS Code
ATX
 
HS Code
2825 80 00
 
Std. Transport #
4966905