Iron(II) fluoride tetrahydrate

  • Ferrous fluoride tetrahydrate
  • Iron difluoride tetrahydrate
Formula
FeF2 : 4H2O
Structure
Description
colorless hexagonal crystals

Registry Numbers and Inventories.
CAS
13940-89-1
20/21/22 34
22 26 27 36/37/39 45
UN (DOT)
3260

Properties.
Formula
F2FeH8O4
Formula mass
165.90
Boiling point, °C
 
Density
2.2 g/cm3 (20 C)

Hazards and Protection.
Storage
Keep tightly closed. Store in a cool dry place.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing. Faceshield (8-inch minimum).
Respirators
Wear appropriate government approved respirator.
Small spills/leaks
Absorb on sand or vermiculite and place in closed containers for disposal. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
May decompose on exposure to moist air or water. Avoid contact with acids and strong bases.
Decomposition
Hydrogen fluoride, iron, iron salts.

Fire.
Fire fighting
Extinguish with dry chemical powder . Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Corrosive. Harmful dust. Emits toxic fumes under fire conditions.

Health.
Exposure effects
Harmful if swallowed, inhaled, or absorbed through skin. Overdose of iron compounds may have a corrosive effect on the gastrointestinal mucosa and be followed by necrosis, perforation, and stricture formation. Several hours may elapse before symptoms that can include epigastric pain, diarrhea, vomiting, nausea, and hematemesis occur. After apparent recovery a person may experience metabolic acidosis, convulsions, and coma hours or days later. Further complications may develop leading to acute liver necrosis that can result in death due to hepatic coma. Symptoms of fluoride overexposure may include salivation, nausea, vomiting, abdominal pain, fever, and labored breathing. Fluoride ion can reduce serum calcium levels possibly causing fatal hypocalcemia. Prolonged exposure to fluoride dusts, vapors, or mists results in perforation of the nasal septum. Chronic effects include excessive calcification of the bones, ligaments, and tendons. Material is extremely destructive to tissue of the mucous membranes and upper respiratory tract, eyes, and skin. Inhalation may result in spasm, inflammation and edema of the larynx and bronchi, chemical pneumonitis, and pulmonary edema. Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.
UN number
3260
Response guide
Hazard class
8
Packing Group
II