Naproxen
[CAS# 22204-53-1]

Identification

• Classification: API >> Antipyretic analgesics >> Non-steroidal anti-inflammatory drugs
• Name: Naproxen
• Synonyms: (+)-2-(6-Methoxy-2-naphthyl)-propionic acid; (S)-6-Methoxy-alpha-methyl-2-naphthaleneacetic acid
• Molecular Formula: C₁₄H₁₄O₃
• Molecular Weight: 230.26
• CAS Registry Number: 22204-53-1
• EC Number: 244-838-7

Properties

• Melting point: 153-154 ºC

Safety Data

• Hazard Symbols: Xn
• Risk Codes: R22
• Safety Description: S36/37

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335
Reproductive toxicity	Repr.	2	H361
Acute toxicity	Acute Tox.	3	H301
Acute toxicity	Acute Tox.	4	H332
Reproductive toxicity	Repr.	1B	H360
Specific target organ toxicity - repeated exposure	STOT RE	2	H373
Chronic hazardous to the aquatic environment	Aquatic Chronic	2	H411
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Specific target organ toxicity - repeated exposure	STOT RE	1	H372
Acute toxicity	Acute Tox.	4	H312
Carcinogenicity	Carc.	2	H351
Eye irritation	Eye Irrit.	2A	H319
Reproductive toxicity	Lact.	-	H362
Specific target organ toxicity - single exposure	STOT SE	3	H371
Acute toxicity	Acute Tox.	3	H331
Reproductive toxicity	Repr.	2	H361fd

• Transport Information: UN 2811