7-Dehydrocholesterol/high quality animals extract CAS NO.434-16-2 CAS NO.434-16-2

Details:

cas: 434-16-2
mf: c27h44o
mw: 384.64
einecs: 207-100-5
package:25kg/bucket
purity:95%

7-dehydrocholesterol is a zoosterol that functions in the serum as a cholesterol precursor, and is converted to vitamin d3 in the skin, therefore functioning as provitamin-d3. the presence of this compound in human skin enables humans to manufacture vitamin d3 from ultra-violet rays in the sun light, via an intermediate isomer pre-vitamin d3. it is also found in the milk of several mammalian species. in insects it is a precursor for the hormone ecdysone, required for reaching adulthood.it was discovered by nobel-laureate organic chemist adolf windaus

synthesis of pre-vitamin d3 in the skin involves uvb radiation which effectively penetrates only the epidermal layers of skin. 7-dehydrocholesterol absorbs uv light most effectively at wavelengths between 290-320nm and thus the production of vitamin d3 will only occur at those wavelengths. the two most important factors that govern the generation of pre-vitamin d3 are the quantity (intensity) and quality (appropriate wavelength) of the uvb irradiation reaching the 7-dehydrocholesterol deep in the stratum basale and stratum spinosum.[4] another important consideration is the quantity of 7-dehydrocholesterol present in the skin. under normal circumstances, ample quantities of 7-dehydrocholesterol (about 25-50 mg/cm2 of skin) are available in the stratum spinosum and stratum basale of human skin to meet the body's vitamin d requirements.

1. important intermediate in the synthesis of vitamin d3
2. skin sunscreen additive in cosmetics
3. other laboratory reagents

 

Q: What's your MOQ
A: For the high value product, our MOQ starts from 1g and generally starts from 10gs. For other low, price product, our MOQ starts from 100g and 1kg.

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A: Yes, for larger quantity, we always support with better price. 

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