Ferric subsulfate

  • Iron hydroxide sulfate
  • Iron dihydroxide pentakis(sulfate)
  • Monsel's salt
  • Iron subsulfate
Structure
Description
Odorless, light yellow, hydroscopic powder.
Uses
Used as a mordant in dyeing textiles.

Registry Numbers and Inventories.
CAS
1310-45-8
EC (EINECS/ELINCS)
215-179-2
Merck
12,4078
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Density
1.55 g/cm3

Hazards and Protection.
Storage
Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect from physical damage and direct sunlight.
Protection
Wear protective gloves and clean body-covering clothing. Use chemical safety goggles. Maintain eye wash fountain and quick-drench facilities in work area.
Respirators
If the exposure limit is exceeded and engineering controls are not feasible, a half facepiece particulate respirator (NIOSH type N95 or better filters) may be worn for up to ten times the exposure limit or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest. A full-face piece particulate respirator (NIOSH type N100 filters) may be worn up to 50 times the exposure limit, or the maximum use concentration specified by the appropriate regulatory agency, or respirator supplier, whichever is lowest. If oil particles (e.g. lubricants, cutting fluids, glycerine, etc.) are present, use a NIOSH type R or P filter. For emergencies or instances where the exposure levels are not known, use a full-facepiece positive-pressure, air-supplied respirator. WARNING: Air-purifying respirators do not protect workers in oxygen-deficient atmospheres.
Small spills/leaks
Pick up and place in a suitable container for reclamation or disposal, using a method that does not generate dust.
Stability
Light sensitive (darkens).
Incompatibilities
Air, moisture.
Decomposition
Oxides of sulfur and the contained metal.

Fire.
Fire fighting
Use any means suitable for extinguishing surrounding fire. In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode.
Fire potential
Not considered to be a fire or explosion hazard.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
ACGIH Threshold Limit Value (TLV): 1 mg/m3 (TWA) soluble iron salt as Fe
Exposure effects
Persons with pre-existing skin disorders or eye problems, or impaired liver, kidney or respiratory function may be more susceptible to the effects of the substance.
   Ingestion
Low toxicity in small quantities but larger dosages may cause nausea, vomiting, diarrhea, and black stool. Pink urine discoloration is a strong indicator of iron poisoning. Liver damage, coma, and death from iron poisoning has been reported.
   Inhalation
Excessive inhalation of dust is irritating to the respiratory tract.
   Skin
May cause irritation.
   Eyes
No adverse effects expected but dust may cause mechanical irritation.

First aid
 
   Ingestion
Induce vomiting immediately as directed by medical personnel. Never give anything by mouth to an unconscious person.
   Inhalation
Remove to fresh air. Get medical attention for any breathing difficulty.
   Skin
Wash exposed area with soap and water. Get medical advice if irritation develops.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, lifting lower and upper eyelids occasionally. Get medical attention immediately.

Transport.