Chromic acetate

  • Chromium triacetate
Formula
Cr(CH3COO)3
Structure
Description
A grayish green to bluish green powder.
Uses
Mordant in dyeing, in tanning, in hardening photographic emulsions, as oxidation catalyst, to improve light stability & dye affinity of textiles & polymers, in catalyst for polymerization of olefins.

Registry Numbers and Inventories.
CAS
1066-30-4
EC (EINECS/ELINCS)
213-909-4
RTECS
AG2975000
RTECS class
Tumorigen; Mutagen
UN (DOT)
9101
Merck
12,2275
Beilstein/Gmelin
3693593
Beilstein Reference
4-02-00-00094
RCRA
D007
EPA OPP
21102
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
3C2H3O2*Cr
Formula mass
232.15
Boiling point, °C
100
Density
1.30 g/cm3 (20 C)
Solubility in water
Slightly soluble

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). Adjust pH to neutral (pH=7). Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Stability
Trivalent chromium is the most stable oxidation state and hexavalent chromium is the second most stable state.
Incompatibilities
Potentially hazardous incompatibility with strong oxidizers.
Decomposition
When heated to decomposition it emits acrid smoke and irritating fumes.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Fire potential
May burn but does not ignite readily.
Hazards
Some may burn but none ignite readily. May polymerize explosively when heated or involved in a fire. Containers may explode when heated. Some may be transported hot.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV (as Cr): ppm; 0.05 mg/m3 (ACGIH 1993-1994).
Carcinogin
N-1, CP65
Exposure effects
Hepatic encephalopathy, cerebral edema, and coma may occur. Both trivalent and hexavalent chromium have been found to cross the placental barrier in hamsters and mice. Both were shown to enter the fetus during mid to late gestation. Developmental effects caused by both differed between hamster and mice. Fetal uptake of hexavalent chromium was much greater than that of the trivalent form. Effects on placental tissue could have also affected the fetus.
   Ingestion
Gastroenteritis and hemorrhage frequently occur immediately following oral ingestion.
   Inhalation
Pulmonary edema, pneumoconiosis, metal fume fever, and bronchial asthma may occur.
   Skin
Deep perforating ulcers and hypersensitivity dermatitis may be noted. Systemic toxicity has resulted from minimal dermal exposure.
   Eyes
Oral burns and severe corneal injury may result from acute exposure. Chronic inhalation produces deep perforating nasal ulcers (chrome holes).

First aid
 
   Ingestion
Dilution: immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child). Do not induce vomiting.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Wash the exposed area with water or 10 to 20 percent ascorbic acid solution for 15 minutes. Consult a physician if irritation or pain persists.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
9101
Response guide
Hazard class
9
USCG CHRIS Code
CRT
 
Std. Transport #
4962631