Lead tetrathionate

Formula
Pb(S2O3)2
Structure
Description
White crystalline solid.

Registry Numbers and Inventories.
CAS
26265-65-6
EC (EINECS/ELINCS)
247-566-7
UN (DOT)
2291
Beilstein/Gmelin
246270 (G)
RCRA
D008
Austrailia AICS
Listed

Properties.
Formula
O6PbS4
Boiling point, °C
431.46
Density
5.18 g/cm3 (20 C)
Solubility in water
0.03 g/100 ml cold water

Hazards and Protection.
Storage
Keep containers tightly closed in a well-ventilated area away from food products. Keep away from heat and water.
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
Protect against both inhalation and contact with the skin. Must wear protective clothing including niosh approved rubber gloves and boots, safety goggles or face mask, and a respirator whose canister is specifically approved for this material. Use a self-contained breathing apparatus when material is exposed to fire temperatures. Care must be exercised to decontaminate fully all equipment and clothing after use.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
No data.

Fire.
Fire fighting
Use appropriate media to suppress exposure fire.
Fire potential
Non-Combustible
Combustion products
Toxic fumes Can emit toxic metal fumes and oxides of sulfur.

Health.
Exposure limit(s)
IDHL: 100 mg/m3
Carcinogin
G-A3, I-2B, CP65
Exposure effects
Chronic lead exposure may cause elevated blood pressure and gout. In young children, developmental defects, including learning disabilities and behavioral abnormalities, can occur without symptoms at blood lead levels above 10 micrograms/deciliter. At higher levels of exposure headache, fatigue, irritability and malaise may occur. At high levels, encephalopathy, seizures and focal neurologic findings with imminent risk of death, permanent mental retardation, and motor deficits may occur. Lead is transferred across the placenta. It can affect reproduction in males and females, and affects neurodevelopmental milestones in children with both prenatal and postnatal exposure.
   Ingestion
Chronic lead exposure: abdominal pain, nausea, anorexia, vomiting, constipation, diarrhea, and a metallic taste in the mouth have been reported with chronic toxicity. Severe and paroxysmal colic characterized by a rigid and retracted abdomen may occur.
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Avoid any skin contact. See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Acute exposure - activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. Consider gastric lavage in patients with recent ingestion of liquid or powdered products.
   Inhalation
Remove from further exposure.
   Skin
Wash with soap and water.
   Eyes
Flush with copious amounts of water.

Transport.
UN number
2291
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
LTS