Iron(II) chromite

  • Iron chromate (II)
  • Dichromium iron tetraoxide
  • Iron chromite
Formula
FeCr2O4
Description
Brown-black, cubic.
Uses
Only commercial source of chromium & its compounds.

Registry Numbers and Inventories.
CAS
1308-31-2
EC (EINECS/ELINCS)
215-159-3
RTECS
GB4000000
RTECS class
Tumorigen; Mutagen
Beilstein/Gmelin
74071 (G)
RCRA
D007
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
Al0.37Cr.56Fe0.37Mg0.7O4
Formula mass
223.85
Melting point, °C
2190 - 2270
Density
4.97 g/cm3 (20 C)
Solubility in water
Insoluble

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
Where atmospheric sampling has shown concentration above recommended level. Provide air supplied resp protective equipment for certain jobs. It is necessary to provide overalls which are laundered daily, hand protection and eye protection.
Respirators
Any self contained breathing apparatus that has a full facepiece and is operated in a pressure demand or other positive pressure mode. Any supplied air respirator with a full face piece and operated in pressure demand or other positive pressure mode in combination with an auxiliary self contained breathing apparatus operated in pressure demand or other positive pressure mode.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
No data.
Incompatibilities
Avoid contact with strong oxidizers (such as hydrogen peroxide), alkalis.

Fire.
Fire fighting
Respiratory protection from chromium metal and insoluble chromium salts while fighting fires: Self contained breathing apparatus with a full facepiece operated in pressure demand or other positive pressure mode. Chromium metal and insoluble chromium salts

Health.
Exposure limit(s)
IDHL: 250 mg/m3
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.

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 patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   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.
USCG CHRIS Code
CCD