Diethylstilbestrol
[CAS# 56-53-1]

Identification

• Classification: API >> Hormone and endocrine-regulating drugs >> Estrogen and progestogen drugs
• Name: Diethylstilbestrol
• Synonyms: (E)-3,4-Bis(4-hydroxyphenyl)-3-hexene; (E)-4,4'-(1,2-Diethyl-1,2-ethenediyl)bisphenol; DES
• Molecular Formula: C₁₈H₂₀O₂
• Molecular Weight: 268.35
• CAS Registry Number: 56-53-1
• EC Number: 200-278-5

Properties

• Melting point: 169-175 ºC
• Water solubility: PRACTICALLY INSOLUBLE

Safety Data

• Hazard Symbols: T;N
• Risk Codes: R40;R45;R61;R36/37/38;R51/53
• Safety Description: S36/37/39;S45;S53;S60;S61

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Specific target organ toxicity - single exposure	STOT SE	3	H335
Carcinogenicity	Carc.	1B	H350
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Skin irritation	Skin Irrit.	2	H315
Reproductive toxicity	Repr.	1B	H360
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410
Eye irritation	Eye Irrit.	2	H319
Acute toxicity	Acute Tox.	3	H301
Acute toxicity	Acute Tox.	2	H330
Carcinogenicity	Carc.	2	H351
Reproductive toxicity	Repr.	1A	H360
Eye irritation	Eye Irrit.	2A	H319

• Transport Information: UN 3077