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Chemical Identification
Common Name
Ergocalciferol
IUPAC
(5Z,7E,22E)-(3S)-9,10-secoergosta-5,7,10(19),22-tetraen-3-ol
CAS
(3β,5Z,7E,22E)-9,10-secoergosta-5,7,10(19),22-tetraen-3-ol
CAS No.
50-14-6
Molecular Formula
C28H44O
Molecular Structure
Physical Properties
Molecular weight:396.7; Physical form:Colourless crystals. Melting point:115-118 °C; Solubility:In water 50 mg/l (room temperature). In acetone 69.5, benzene 10, hexane 1 (all in g/l, room temperature).; Stability:Stable in alkaline media. Unstable to light and air, and in acidic media. Above 120 °C, an irreversible reaction takes place, with conversion to the 10a- and 9b- isomers of the provitamin.;
Toxicology
Oral:Acute oral LD50 for rats 56, mice 23.7 mg/kg. Sub-acute oral LD50 (5 d) for rats 7 mg/ kg daily.
Environmental Profile
Environmental fate: Animals:The D vitamins, owing to their metabolic conversion products, play a central role in the regulation of calcium and phosphate metabolism in mammals, which is also affected by the peptide hormones calcitonin and parathormone. These promote uptake of calcium
Transport Information
Hazard Class:O (Obsolete as pesticide, not classified)

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