Calcium bis(dihydrogen phosphate)

  • Calcium biphosphate
  • Calcium dihydrogen orthophosphate
  • Calcium dihydrogen phosphate
  • Calcium diorthophosphate
  • Calcium phosphate monobasic
  • Calcium superphosphate
Formula
Ca(H2PO4P)2
Structure
Description
Shining triclinic plates, crystalline powder or granules.
Uses
In fertilizers, acidulant in baking powder & wheat flours, in enameling, mineral supplement for foods & feeds.

Registry Numbers and Inventories.
CAS
7758-23-8
EC (EINECS/ELINCS)
231-837-1
RTECS
TB8527000
RTECS class
Drug
Merck
12,1740
Beilstein/Gmelin
45081 (G)
Swiss Giftliste 1
G-7155
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CaH4O8P2
Formula mass
234.05
Density
2.22 g/cm3 (20 C)
Solubility in water
moderately soluble

Hazards and Protection.
Storage
Keep tightly closed in a cool place in a tightly closed container.
Handling
Containers of this material may be hazardous when emptied. Since emptied containers retain product residues (vapor, liquid, and/or solid), all hazard precautions given in the data sheet must be observed.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
If workplace exposure limit(s) of product or any component is exceeded (see exposure guidelines), a NIOSH/MSHA approved air supplied respirator is advised in absence of proper environmental control. OSHA regulations also permit other NIOSH/MSHA respirators (negative pressure type) under specified conditions (see your industrial hygienist). Engineering or administrative controls should be implemented to reduce exposure.
Small spills/leaks
Small Spill - Sweep up material for disposal or recovery. Large Spill - Persons not wearing protective equipment should be excluded from area of spill until clean-up has been completed. Shovel material into containers. Thoroughly sweep area of spill to clean up any residual material.
Stability
Stable.
Incompatibilities
Water

Fire.
Fire fighting
Extinguish fire using Use an extinguishing media appropriate for surrounding fire.. No special precautions necessary when fighting fires involving this product.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
-
Exposure effects
Symptoms of exposure to this material through breathing, swallowing, and/or passage of the material through the skin may include: stomach or intestinal upset (nausea, vomiting, diarrhea) irritation (nose, throat, airways).
   Ingestion
Irritation or burns of the oropharynx, esophagus, or gi tract may occur following ingestion. Nausea, vomiting, abdominal pain, hematemesis, bloody diarrhea, and perforation with severe burns may be noted.
   Inhalation
Respiratory tract irritation and coughing may develop. Aspiration pneumonitis has occurred.
   Skin
Dermal irritation or burns may develop.
   Eyes
Can cause permanent eye injury. Symptoms include stinging, tearing, redness, and swelling of eyes. Can injure the cornea and cause blindness.

First aid
 
   Ingestion
First aid is not normally required. If symptoms develop, seek medical attention.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area 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.