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CAS RN: 57-87-4 | Product Number: E0018


Purity: >95.0%(GC)
  • Provitamin D2
3   Contact Us ≥20 
4   1   ≥20 

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Product Number E0018
Purity / Analysis Method >95.0%(GC)
Molecular Formula / Molecular Weight C__2__8H__4__4O = 396.66  
Physical State (20 deg.C) Solid
Storage Temperature 0-10°C
Store Under Inert Gas Store under inert gas
Condition to Avoid Light Sensitive,Hygroscopic,Heat Sensitive
CAS RN 57-87-4
Reaxys Registry Number 2338604
PubChem Substance ID 87569337
SDBS (AIST Spectral DB) 2246
Merck Index (14) 3659
MDL Number


Appearance White to Orange to Green powder to crystal
Purity(GC) min. 95.0 %
Melting point 156.0 to 162.0 °C
Specific rotation [a]20/D -100 to -125 deg(C=1, THF)(calcd.on anh.substance)
Absorbance min. 0.500(20 mg/L, 269.0 to 273.0 nm)
Absorbance2 min. 0.530(20 mg/L, 280.0 to 284.0 nm)
Water max. 7.0 %
Properties (reference)
Melting Point 159 °C
Boiling Point 250 °C/0.01 mmHg
Specific Rotation -113° (C=1,THF)
Related Laws:
Transport Information:
Ergosterol: A Sterol Found in Cell Membranes of Fungi

Ergosterol is a sterol found in cell membranes of fungi which use principally it instead of cholesterol [C0318] on humans and other mammals. So many antifungal agents target ergosterol as a way to disrupt the fungal plasma membrane. Ergosterol is also called provitamin D2 because exposure it to ultraviolet (UV) light causes a chemical reaction that produces vitamin D2 (calciferol or ergocalciferol) [C0005].


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