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
Dielectric constant :6.1（Ambient）
Stability :Stable. Incompatible with acids, fluorine, ammonium salts, alum.
InChIKey :VTYYLEPIZMXCLO-UHFFFAOYSA-L
CAS DataBase Reference :471-34-1(CAS DataBase Reference)
EPA Substance Registry System :Calcium carbonate (471-34-1)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection.