Δ²⁵-cholesterol, also known as 25-dehydrocholesterol, is a naturally occurring steroid compound found in the skin and other tissues of humans and animals. It is a precursor to vitamin D3, playing a crucial role in the synthesis of this essential nutrient. When the skin is exposed to ultraviolet B (UVB) radiation from sunlight, Δ²⁵-cholesterol undergoes a photochemical reaction, converting it into previtamin D3, which is then thermally isomerized to form vitamin D3. This process is vital for maintaining calcium homeostasis and bone health, as well as supporting the immune system. The conversion efficiency of Δ²⁵-cholesterol to vitamin D3 is influenced by various factors, including the intensity and duration of UVB exposure, skin pigmentation, and individual genetic variations.

15240-13-8

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Basic information
1. Product Name: Δ²⁵-cholesterol
2. Synonyms:
3. CAS NO:15240-13-8
4. Molecular Formula:
5. Molecular Weight: 384.646
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: Δ²⁵-cholesterol(CAS DataBase Reference)
10. NIST Chemistry Reference: Δ²⁵-cholesterol(15240-13-8)
11. EPA Substance Registry System: Δ²⁵-cholesterol(15240-13-8)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 15240-13-8(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 15240-13-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,2,4 and 0 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 15240-13:
(7*1)+(6*5)+(5*2)+(4*4)+(3*0)+(2*1)+(1*3)=68
68 % 10 = 8
So 15240-13-8 is a valid CAS Registry Number.

15240-13-8Upstream product

557-93-7 2-bromoprop-1-ene

15240-13-8Downstream Products

116080-09-2 3β-benzoyloxy-cholesta-5,25-diene

15240-13-8Relevant academic research and scientific papers

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