Norethindrone
[CAS# 68-22-4]

Identification

• Classification: API >> Hormone and endocrine-regulating drugs >> Birth control pills
• Name: Norethindrone
• Synonyms: 19-Norethisterone; 17a-Ethynyl-19-nortestosterone; 17-Hydroxy-19-nor-17a-pregn-4-en-20-yn-3-one
• Molecular Formula: C₂₀H₂₆O₂
• Molecular Weight: 298.42
• CAS Registry Number: 68-22-4
• EC Number: 200-681-6

Properties

• Melting point: 205-206 °C

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Carcinogenicity	Carc.	2	H351
Acute toxicity	Acute Tox.	4	H312
Acute toxicity	Acute Tox.	4	H332
Reproductive toxicity	Repr.	1B	H360
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Reproductive toxicity	Repr.	1A	H360
Reproductive toxicity	Lact.	-	H362
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Reproductive toxicity	Repr.	2	H361
Eye irritation	Eye Irrit.	2	H319
Skin sensitization	Skin Sens.	1	H317
Acute toxicity	Acute Tox.	4	H302
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Specific target organ toxicity - single exposure	STOT SE	3	H335
Skin irritation	Skin Irrit.	2	H315
Carcinogenicity	Carc.	1B	H350