21-Hydroxyprogesterone
21-Hydroxyprogesterone (CAS 64-85-7), with the molecular formula C21H30O3 and a molecular weight of 330.46 g/mol, is a steroid hormone. It is a key intermediate in the biosynthesis of steroid hormones. This compound plays a role in various physiological processes and is utilized in biochemical research for studying steroidogenesis and related pathways.
- IUPAC
- ‘Reichstein Q’,11-Deoxycorticosterone,11-Desoxycorticosterone,21-Hydroxy-4-pregnene-3,20-dione,4-Pregnen-21-ol-3,20-dione,Cortexone,DOC,Desoxycortone,Kendall’s desoxy compound B
- Synonyms
- 4-Pregnen-21-ol-3,20-dione21-Hydroxy-4-pregnene-3,20-dioneCortexoneDOCDesoxycortoneKendall’s desoxy compound B11-Deoxycorticosterone11-Desoxycorticosterone‘Reichstein Q’

Biochemical Research
Serves as a crucial intermediate in the study of steroid biosynthesis pathways. Its role in the production of various hormones makes it valuable for endocrinology research.
Cell Biology Studies
Used in cell-based assays to investigate the effects of steroid hormones on cellular function and signaling. Aids in understanding cellular responses to hormonal stimuli.
Hormone Research
Essential for research focused on the complex regulatory mechanisms of the endocrine system, particularly concerning adrenal and reproductive hormones.
| Molecular weight | 330.46 |
|---|---|
| Empirical formula | C21H30O3 |
| Assay | ≥97% (HPLC) |

Hazard statements
- H351Suspected of causing cancer
- H373May cause damage to organs through prolonged exposure
Precautionary statements
- P281Use personal protective equipment as required
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 40-48 |
| Safety statements (S) | 22-24/25 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Gene Information | human ... SERPINA6(866) |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 21-Hydroxyprogesterone primarily used for?
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21-Hydroxyprogesterone is primarily used in biochemical research for studying steroid biosynthesis pathways and hormone regulation, as well as in cell biology studies to investigate cellular responses to steroid hormones.
What are the CAS number and molecular formula for 21-Hydroxyprogesterone?
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The CAS number for 21-Hydroxyprogesterone is 64-85-7, and its molecular formula is C21H30O3.
What grade and purity does Tech Serve Solutions supply for 21-Hydroxyprogesterone?
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Tech Serve Solutions supplies 21-Hydroxyprogesterone with a purity of ≥97% (HPLC). We do not represent this product as USP, BP, or EP grade.
What are the key safety considerations when handling 21-Hydroxyprogesterone?
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21-Hydroxyprogesterone is classified with the GHS symbol GHS08 and a signal word of Warning, with hazard statements H351 (Suspected of causing cancer) and H373 (May cause damage to organs through prolonged or repeated exposure). Appropriate personal protective equipment including a dust mask type N95 (US), eyeshields, and gloves should be used. Handle with adequate ventilation.
How is 21-Hydroxyprogesterone typically packed and exported by TSS?
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21-Hydroxyprogesterone is carefully packed to maintain its integrity during transit and is exported globally by Tech Serve Solutions in compliance with international shipping regulations.
How can I request a sample or a quote for 21-Hydroxyprogesterone?
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To request a sample or a quote for 21-Hydroxyprogesterone, please contact our sales team through the website or by phone, providing your specific requirements.
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