Levonorgestrel (CAS 797-63-7) Sigma-Aldrich

Levonorgestrel molecular structure — Molecular structure

The Sigma-Aldrich catalog lists 5 grades and pack sizes of Levonorgestrel (CAS 797-63-7). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS	797-63-7
Molecular formula	C21H28O2
Molecular weight	312.45 g/mol
IUPAC name	(8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one
Synonyms	D-Norgestrel · Mirena · Levonova · Microval · NORPLANT · Plan B

Safety & Hazards (GHS) Danger

Irritant

Health hazard

H312 Harmful in contact with skin
H332 Harmful if inhaled
H351 Suspected of causing cancer
H360 May damage fertility or the unborn child

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand	Product / grade	Code
Sigma	LEVONORGESTREL	1362602-125MG L0551000 PHR1850-500MG	Request Quote
Sigma	LEVONORGESTREL FOR SYSTEM SUITABILITY 2	Y0001618	Request Quote
Sigma	LEVONORGESTREL, BRITISH PHARMACOPOEIA (B	BP501	Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.