Phenylbutazone (CAS 50-33-9) Sigma-Aldrich

Phenylbutazone molecular structure — Molecular structure

The Sigma-Aldrich catalog lists 6 grades and pack sizes of Phenylbutazone (CAS 50-33-9). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS	50-33-9
Molecular formula	C19H20N2O2
Molecular weight	308.38 g/mol
IUPAC name	4-butyl-1,2-diphenylpyrazolidine-3,5-dione
Synonyms	4-Butyl-1,2-diphenylpyrazolidine-3,5-dione · Butapirazol · Butazolidin · Butadion · Flexazone · Azolid

Safety & Hazards (GHS) Danger

Acute toxic

Health hazard

H301 Toxic if swallowed
H312 Harmful in contact with skin
H315 Causes skin irritation
H319 Causes serious eye irritation
H332 Harmful if inhaled
H335 May cause respiratory irritation
H351 Suspected of causing cancer

⚠️ 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	PHENYLBUTAZONE	80184-100MG P1200000	Request Quote
Sigma	PHENYLBUTAZONE CRYSTALLINE	P8386-100G P8386-25G P8386-500G	Request Quote
Sigma	PHENYLBUTAZONE, UNITED STATES PHARMACOPE	1531007-250MG	Request Quote

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