C19H20N2O2
308.4 g/mol
APIDanger
Phenylbutazone
CAS50-33-9EC200-029-0
Category
API
Compound Class
Heterocycle
Primary Use
Pharmaceutical Raw Material
Phenylbutazone is an odorless white or off-white crystalline powder with a slightly bitter aftertaste. It is a pharmaceutical raw material used as a veterinary analgesic and anti-inflammatory.
Pharmaceutical raw material for veterinary analgesic and anti-inflammatory manufacturingActive pharmaceutical ingredient used in veterinary medicine
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Propantheline bromide
CAS50-34-0
pharmaceutical raw material
ReferenceSame Category
Thalidomide
CAS50-35-1
pharmaceutical raw material
ReferenceSame Category
Clomifene citrate
CAS50-41-9
pharmaceutical raw material
ReferenceSame Category
Adiphenine hydrochloride
CAS50-42-0
pharmaceutical raw material
Referencesame scaffold
Kebuzone
CAS853-34-9
pharmaceutical raw material
Referencesame scaffold
Suxibuzone
CAS27470-51-5
pharmaceutical raw material
Safety Reference
Danger
H301Toxic if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H332Harmful if inhaled
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335May cause respiratory irritation
H351Suspected of causing cancer
H361Suspected of damaging fertility or the unborn child
Customs Tariff Classification
The international HS code for Phenylbutazone (CAS 50-33-9) is 2933.19.
HS code (international, 6-digit)
2933.19
EU CN code (8-digit)
2933 19 10
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
4-butyl-1,2-diphenylpyrazolidine-3,5-dione
InChIKey
VYMDGNCVAMGZFE-UHFFFAOYSA-N
SMILES
CCCCC1C(=O)N(N(C1=O)C2=CC=CC=C2)C3=CC=CC=C3
Synonyms (216)
- R-3-ZON
- Fenilbutazona [INN-Spanish]
- Phenylbutazone (JP18/USP/INN)
- Phenylbutazone Tablets, USP 1 gram
- Phenylbutazone Tablets, USP 100 mg, Phenylbutazone Tablets, USP 200 mg
- Phenylbutazone, European Pharmacopoeia (EP)
- Phenylbutazone, United States Pharmacopeia (USP)
- Phenylbutazone; Suxibuzone EP Impurity A
- Phenylbutazonum [INN-Latin]
- 1,3-dioxo-4-N-butylpyrazoline
- 1,5-dioxo-4-butylpyrazolidine
- 1,5-dioxopyrazolidine
- 3, 4-butyl-1,2-diphenyl-
- 4-Butyl-1,5-dione
- 4-Butyl-1,5-dioxopyrazolidine
- 4-Butyl-1,5-pyrazolidinedione
- 50-33-9 (free form)
- AZOLID (TN)
- Alindor
- Alkabutazona
- Alkazone
- Alqoverin
- Ambene
- Anerval
- Anpuzone
- Antadol
- Anuspiramin
- Arthrizon
- Artrizin
- Artrizone
- Artropan
- Azdid
- Azobutyl
- Azolid
- B.t.z.
- Benzone
- Betazed
- Bizolin
- Bizolin 1-G
- Bizolin 200
- Bizolin Injection
- Bizolin-100, Bizolin-200
- Bunetzone
- Busone
- Butacompren
- Butacote
- Butadion
- Butadiona
- Butadionum
- Butagesic
- Butaject
- Butalgina
- Butalidon
- Butaluy
- Butaphen
- Butapirazol
- Butapirazole
- Butapyrazole
- Butarecbon
- Butartril
- Butartrina
- Butatron
- Butatron Gel
- Butazina
- Butazolidin
- Butazolidin Granules
- Butazolidin Injectable
- Butazolidine
- Butazona
- Butazone
- Bute
- Butequine
- Butidiona
- Butiwas-Simple
- Butone
- Butoz
- Butylpyrin
- Buvetzone
- Buzon
- Chembutazone
- Digibutina
- Diossidone
- Diozol
- Diphebuzol
- Diphenylbutazone
- EQUIZONE 50/100
- Ecobutazone
- Elmedal
- Equi bute
- EquiBute Injection
- EquiBute Tablets 100 mg
- Equipalazone
- Equiphar
- Equizone 100
- Eributazone
- Exrheudon N
- Febuzina
- Fenartil
- Fenibutal
- Fenibutasan
- Fenibutazona
- Fenibutol
- Fenilbutazon
- Fenilbutazona
- Fenilbutazone
- Fenilbutina
- Fenilbutine
- Fenilidina
- Fenotone
- Fenylbutazon
- Flexazone
- G 13,871
- Ia-But
- Intalbut
- Intrabutazone
- Intrazone
- Ipsoflame
- Kadol
- Lingel
- Malgesic
- Mephabutazon
- Mephabutazone
- Merizone
- Nadazone
- Nadozone
- Neo-zoline
- Novophenyl
- PHENYLBUTAZONE [MART.]
- Phebuzin
- Phebuzine
- Phen-Buta
- Phen-Buta Vet Injection
- Phen-Buta-Vet
- Phenbutazol
- Phenbutazone;
- Phenogel
- Phenopyrine
- Phenyl-Mobuzon
- Phenylbutaz
- Phenylbutazon
- Phenylbutazon [German]
- Phenylbutazone (Standard)
- Phenylbutazone 20% Injection
- Phenylbutazone Boluses
- Phenylbutazone CRS
- Phenylbutazonum
- Phenyzene
- Phenyzone
- Pirarreumol B
- Praecirheumin
- Pributazone
- Pro-Bute
- Pyrabutol
- Pyrazolidin
- Rectofasa
- Reudo
- Reudox
- Reumasyl
- Reumazin
- Reumazol
- Reumune
- Reumuzol
- Reupolar
- Robizon-V
- Robizone
- Robizone Injectable
- Robizone-V
- Rubatone
- SUXIBUZONE IMPURITY A
- Scanbutazone
- Schemergen
- Schemergin
- Shigrodin
- Superiorbute
- Tazone
- Tencodyne
- Tetnor
- Tevcodyne
- Tevcodyne Injectable
- Therazone
- Ticinil
- Todalgil
- Usaf ge-15
- Uzone
- VetriBute
- Wescozone
- Zolaphen
- Zolidinum
- component of Azolid-A
- esteve
- phenylbutazone
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