Shanghai Nianxing Industrial Co., Ltd
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Dayang Chem (Hangzhou) Co., Ltd.
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Henan Tianfu Chemical Co., Ltd.
China
Product Name: cholesta-5,7-dien-3β-ol
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Zhongshan Xingrui Chemical Co. , Ltd.
China
Product Name: (3β)-7-Dehydro Cholesterol
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434-16-2

434-16-2 structure

434-16-2 structure

Name: (3β)-7-Dehydro Cholesterol
Chemical Name: cholesta-5,7-dien-3β-ol
CAS Number: 434-16-2
Molecular Formula: C₂₇H₄₄O
Molecular Weight: 384.638
Catalog: Chemical reagent Organic reagent Fatty alcohol
Create Date: 2018-05-23 08:00:00
Modify Date: 2026-07-02 08:55:16
7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3.

Name	cholesta-5,7-dien-3β-ol
Synonyms	Cholecalciferol Impurity 2（Cholecalciferol Impurity B） 7-DEHYDROCHOLESTEROL (7-DHC) (3-beta)-7-Dehydrocholesterol (Cholesta-5,7-dien-3-beta-ol) (3b)-7-Dehydrocholesterol 7-dien-3-ol,(3.beta.)-Cholesta-5 3BETA-HYDROXY-5,7-CHOLESTADIENE 7-Dehydrocholesterol, contains ca. 1 Mole of Methanol of crystallization, R cholesta-5,7-dien-3-beta-ol (3)-7-Dehydrochlesterol 5,7-Cholestandien-3.beta.-ol 7-Dehydrocholesterol 5,7-CHOLESTADIEN-3-BETA-OL MONOHYDRATE cholesta-5,7-dien-3b-ol (3beta)-cholesta-7-dien-3-ol DELTA5,7-Cholestadien-3beta-ol DEHYDROCHOLESTEROL, 7 (-)-7-DEHYDROCHOLESTEROL 5,7-Cholestandien-3beta-ol 7-Dehydrocholseterol Δ7-Cholesterol 7-dehydro-cholestero Cholesta-5,7-dien-3-ol IMp. B : Cholesta-5,7-dien-3β-ol(7,8-Didehydrocholesterol delta(sup7)-cholesterol 7-DHC 10,13-dimethyl-17-(6-methylhtan-2-yl)-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-ol 3-Hydroxycholesta-5,7-diene DEHYDROCHOLESTEROL, 7-(AS) delta7-Cholesterol Cholesta-5,7-dien-3-β-ol Provitamin D3 EINECS 207-100-5 5,7-CHOLESTADIEN-3BETA-OL (3Beta)-7-Dehydro Cholesterol 7-Dehydrochlesterol 7-DehydrocholesterolProvitamine 3β-Hydroxy-5,7-cholestadiene Provitamine delta5,7-Cholesterol 7-Dehydrocholesterol - min 7-Dehydrocholesterin 7-DEHYDROCHOLESTEROL MONOHYDRATE (-)-7-dehydrocholesterol provitamind(sub3) Dehydrocholesterin (3β)-Cholesta-5,7-dien-3-ol 5,7-Cholestadien-3β-ol 7-DEHYDROCHOLESTEROL Cholecalciferol Impurity B 7-Dehydrocholesterol contains ca. 1 mole of methanol of crystallization 3-beta-7-Dehydro Cholesterol 7-Dehydrocholesterol (Provitamin D3) Cholesta-5,7-dien-3β-ol (8CI) (3-beta)-cholesta-7-dien-3-ol 7-Dehydrocholesterol (ProvitaMin D) (3beta)-Cholesta-5,7-dien-3-ol Dehydrocholesterol Cholesterol, 7-dehydro delta(sup5,7)-cholesterol (3b)-Cholesta-5,7-dien-3-ol 7-Dehydrocholesterolmonohydrate cholesta-5,7-dien-3beta-ol 3beta-Hydroxycholesta-5,7-diene Cholesta-5,7-dien-3-ol, (3beta) Provitamin D(sub 3) (-)-7-Dehydrocholesterol, 3β-Hydroxy-5,7-cholestadiene, 5,7-Cholestadien-3β-ol, Provitamin D3 MFCD00003624 Cholesta-5,7-dien-3β-ol 7-Dehydrocholesterol, contains ca. 1 mole of methanol of crystallization 7,8-Didehydrocholesterol (3β)-7-Dehydrocholesterol

Description	7-Dehydrocholesterol is biosynthetic precursor of cholesterol and vitamin D3.
Related Catalog	Natural Products >> Steroids Research Areas >> Others
Target	Human Endogenous Metabolite
In Vitro	7-Dehydrocholesterol is a biosynthetic precursor of cholesterol and vitamin D3. 7-Dehydrocholesterol is present in relatively high concentration in skin where it is converted to pre-vitamin D3 upon UV irradiation and where it is also exposed to exogenous radical sources and oxygen[1].
References	[1]. Xu L, et al. Oxysterols from free radical chain oxidation of 7-dehydrocholesterol: product and mechanistic studies. J Am Chem Soc. 2010 Feb 24;132(7):2222-32.

Density	1.0±0.1 g/cm3
Boiling Point	493.7±34.0 °C at 760 mmHg
Melting Point	148-152 °C(lit.)
Molecular Formula	C₂₇H₄₄O
Molecular Weight	384.638
Flash Point	212.3±17.9 °C
Exact Mass	384.339203
PSA	20.23000
LogP	9.46
Vapour Pressure	0.0±2.8 mmHg at 25°C
Index of Refraction	1.536
Storage condition	-20℃

CHEMICAL IDENTIFICATION

RTECS NUMBER :: FZ5650000

CHEMICAL NAME :: Cholesta-5,7-dien-3-beta-ol

CAS REGISTRY NUMBER :: 434-16-2

LAST UPDATED :: 199701

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C27-H44-O

MOLECULAR WEIGHT :: 384.71

WISWESSER LINE NOTATION :: L E5 B666 JU LUTJ A1 E1 FY1&3Y1&1 OQ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 60 gm/kg/2W-I

TOXIC EFFECTS :: Tumorigenic - Carcinogenic by RTECS criteria Tumorigenic - tumors at site of application

REFERENCE :: NATWAY Naturwissenschaften. (Springer-Verlag, Heidelberger Platz 3, D-1000 Berlin 33, Fed. Rep. Ger.) V.1- 1913- Volume(issue)/page/year: 60,525,1973

Personal Protective Equipment	Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Safety Phrases	S24/25
RIDADR	NONH for all modes of transport
WGK Germany	3
RTECS	FZ5650000

Precursor 9
54604-59-0 57-88-5 6038-38-6 809-51-8
604-35-3 106-51-4 3464-60-6 64110-25-4
74512-95-1
DownStream 9
67-97-0 1173-13-3 17592-07-3 5226-01-7
37706-52-8 29374-80-9 80-99-9 566-99-4
63-05-8

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