- 1a-Hydroxyvitamin D3
- 9,10-Secocholesta-5,7,10(19)-triene-1,3-diol, (1a,3b,5Z,7E)
Fine white crystals
A form of vitamin D. It is converted rapidly in the liver to the active metabolite, 1,25-dihydroxycholecalciferol (calcitriol).
Registry Numbers and Inventories.
28 36/37 45
Drug; Reproductive Effector
Melting point, °C
132 - 133
Vapor pressure, mmHg
2E-13 (25 C)
Solubility in water
Heat of vaporization
Hazards and Protection.
Keep tightly closed. Store at -20 C
Compatible chemical-resistant gloves.
Government approved respirator.
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Stable at normal temperatures and pressures.
Strong oxidizing agents.
Carbon monoxide, Carbon dioxide.
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Emits toxic fumes under fire conditions.
Fire may produce irritating, corrosive and/or toxic gases.
Very toxic by inhalation, in contact with skin and if swallowed.
May be fatal if swallowed.
May be fatal if inhaled. Material may be irritating to mucous membranes and upper respiratory tract.
May cause skin irritation. May be fatal if absorbed through skin.
May cause eye irritation.
If swallowed, wash out mouth with water provided person is conscious. Call a physician immediately.
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
In case of skin contact, flush with copious amounts of water for at least 15 minutes. Remove contaminated clothing and shoes. Call a physician.
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.