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Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:




pkg of 1 × 1 mg (700138P-1mg)


Avanti Polar Lipids 700138P

shipped in

dry ice

storage temp.




InChI key


General description

7-dehydrodesmosterol (7-DHD) is synthesized via the Bloch pathway. 7-DHD serves as a desmosterol synthesis precursor and the enzyme 7-dehydrocholesterol reductase (DHCR7) catalyzes this step.


7-dehydrodesmosterol has been used as an internal oxysterol standard in ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS).

Biochem/physiol Actions

7-dehydrodesmosterol (7-DHD) levels are higher during fetal development and increases with aging. Elevated levels of 7-DHD is associated with Smith-Lemli-Opitz syndrome mouse model. Reduced levels of 7-DHD is observed in shiverer and quaking disorder.


5 mL Amber Glass Screw Cap Vial (700138P-1mg)

Storage Class Code

13 - Non Combustible Solids

Certificate of Analysis

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Certificate of Origin

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J M Bourre et al.
Journal of neurochemistry, 54(4), 1196-1199 (1990-04-01)
In rat sciatic nerve, the 7-dehydrocholesterol content decreased dramatically during the postnatal period and slowly during adulthood and aging. In contrast, the 7-dehydrodesmosterol content peaked at 14 days and was nearly undetectable after 60 days. The desmosterol content peaked at
Alterations of cholesterol synthesis precursors (7-dehydrocholesterol, 7-dehydrodesmosterol, desmosterol) in dysmyelinating neurological mutant mouse (quaking, shiverer and trembler) in the PNS and the CNS
Bourre JM, et al.
Biochimica et Biophysica Acta, Lipids and Lipid Metabolism, 1004(3), 387-390 null
Anna Meljon et al.
Biochemical pharmacology, 86(1), 43-55 (2013-03-19)
In this study the sterol and oxysterol profile of newborn brain from the Dhcr7(Δ3-5/T93M) mouse model of Smith-Lemli-Opitz syndrome (SLOS) has been investigated. This is a viable mouse model which is compound heterozygous containing one null allele and one T93M
Vladimiro Cardenia et al.
Biochimie, 153, 99-108 (2018-08-06)
The electronic cigarettes (e-cigarettes, e-cigs) have become the most sought-after alternative to the traditional cigarettes, partly due to the widespread perception of safety. However, the high temperature reached by e-cig solutions can generate toxic compounds, some of which are listed
Josi Herron et al.
Current protocols in toxicology, 78(1), e65-e65 (2018-10-16)
Cholesterol and cholesterol-derived oxysterols are critical for embryonic development, synapse formation and function, and myelination, among other biological functions. Indeed, alterations in levels of cholesterol, sterol precursors, and oxysterols result in a variety of developmental disorders, emphasizing the importance of

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