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Calcium carbonate Structure

Calcium carbonate

Chemical Properties

Melting point 825 °C
Boiling point 800 °C
Density  2.93 g/mL at 25 °C (lit.)
refractive index  1.6583
storage temp.  Store at +5°C to +30°C.
solubility  5 M HCl: 0.1 M at 20 °C, clear, colorless
form  random crystals
Specific Gravity 2.93
color  White-beige to slightly beige-gray
PH 9.91(1 mM solution);9.91(10 mM solution);9.91(100 mM solution);
Odor Odorless
PH Range 8
Water Solubility  Insoluble
λmax λ: 260 nm Amax: ≤0.09
λ: 280 nm Amax: ≤0.06
Merck  14,1657
BRN  8008338
Solubility Product Constant (Ksp) pKsp: 8.54
Exposure limits NIOSH: TWA 10 mg/m3; TWA 5 mg/m3
Stability Stable. Incompatible with acids, fluorine, ammonium salts, alum.
CAS DataBase Reference 471-34-1(CAS DataBase Reference)
FDA 21 CFR 184.1191; 582.1191; 582.5191; 73.1070; 73.70; 176.170; 178.3297; 181.29; 310.545; 558.128
Substances Added to Food (formerly EAFUS) CALCIUM CARBONATE
SCOGS (Select Committee on GRAS Substances) Calcium carbonate
EWG's Food Scores 1
NCI Dictionary of Cancer Terms calcium carbonate
NCI Drug Dictionary calcium carbonate
ATC code A02AC01,A12AA04
EPA Substance Registry System Calcium carbonate (471-34-1)
Cosmetics Info Calcium Carbonate


Signal wordWarning
Hazard statements H315-H319-H335
Precautionary statements P261-P280-P271
Hazard Codes  Xi
Risk Statements  37/38-41-36/38-36
Safety Statements  26-36/37/39-37/39-37
WGK Germany  -
RTECS  FF9335000
HS Code  28365000
Hazardous Substances Data 471-34-1(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 6450 mg/kg LD50 dermal Rat > 2000 mg/kg
NFPA 704:
2 0

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