C9H8O4
180.16 g/mol
APIWarning
Aspirin
CAS50-78-2EC200-064-1
Category
API
Compound Class
Organic Acid
Primary Use
Pharmaceutical Raw Material
Aspirin, also known as acetylsalicylic acid, is an active pharmaceutical ingredient used in the production of medications. It is a nonsteroidal anti-inflammatory compound widely supplied for pharmaceutical manufacturing.
anti-inflammatory agent for pharmaceutical formulationsantithrombotic agent for manufacturingraw material for analgesic preparations
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.
Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
Relevant lists:California Proposition 65
CAS 50-78-2
Related Compounds
ReferenceSame Category
Fluphenazine decanoate
CAS5002-47-1
pharmaceutical raw material
ReferenceSame Category
Rilpivirine
CAS500287-72-9
pharmaceutical raw material
ReferenceSame Category
Deoxyepinephrine
CAS501-15-5
pharmaceutical raw material
ReferenceSame Category
Trimetazidine
CAS5011-34-7
pharmaceutical raw material
Referencestereoisomer of
Carbaspirin calcium
CAS5749-67-7
pharmaceutical raw material
Referencestereoisomer of
2-(Acetyloxy)(²H₄)benzoic acid
CAS97781-16-3
research compound
Safety Reference
Warning
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H412Harmful to aquatic life with long lasting effects
H360May damage fertility or the unborn child
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H316Causes mild skin irritation
H371May cause damage to organs
H373May cause damage to organs through prolonged or repeated exposure
Regulatory Compliance1
- California Proposition 65USRegulation
Customs Tariff Classification
The international HS code for Aspirin (CAS 50-78-2) is 2918.22.
HS code (international, 6-digit)
2918.22
EU CN code (8-digit)
2918 22 00
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
2-acetyloxybenzoic acid
InChIKey
BSYNRYMUTXBXSQ-UHFFFAOYSA-N
SMILES
CC(=O)OC1=CC=CC=C1C(=O)O
Synonyms (410)
- ASA
- ASPIRN
- ECM
- S-211
- XAXA
- Acetylsalicylic acid for peak identification, European Pharmacopoeia (EP)
- Acetylsalicylic acid, European Pharmacopoeia (EP)
- Aspirin (JP18/USP)
- Aspirin, British Pharmacopoeia (BP)
- Aspirin, United States Pharmacopeia (USP)
- Aspirin, meets USP testing specifications
- 1oxr
- 2-(Acetyloxy)benzoic acid
- 2-(acetyloxy)benzoate
- 2-Acetoxybenzoate
- 2-Acetoxybenzoic acid
- 2-Acetylsalicyclic acid
- 2-Carboxyphenyl acetate
- 8-hour Bayer
- A.S.A. empirin
- ACETYLSALICYLIC ACID
- ACETYLSALICYLIC ACID; ASPIRIN
- ADVANCED ASPIRIN
- AGGRENOX COMPONENT ASPIRIN
- ASPIRIN 325 MG EC
- ASPIRIN 480
- ASPIRIN BOLUS-480
- ASPIRIN [MART.]
- AXOTAL COMPONENT ASPIRIN
- AZDONE COMPONENT ASPIRIN
- Acenterine
- Acesal
- Acesan
- Acetard
- Aceticyl
- Acetilsalicilico
- Acetilum acidulatum
- Acetisal
- Acetonyl
- Acetophen
- Acetosal
- Acetosalic acid
- Acetosalin
- Acetoxybenzoic acid
- Acetylin
- Acetylsal
- Acetylsalic acid
- Acetylsalicyclic acid
- Acetylsalicylic Acid Coated
- Acetylsalicylic acid (who-ip)
- Acetylsalicylic acid CRS
- Acetylsalicylic acidASA
- Acetylsalicylicum acidum
- Acetylsalicylsaeure
- Acetylsalicylsaure
- Acetylsalicylsaure [German]
- Acetylsalycilic acid
- Acetyonyl
- Acetysal
- Acetysalicylic acid
- Acid, Acetylsalicylic
- Acide acetylsalicylique
- Acido O-acetil-benzoico
- Acido acetilsalicilico
- Acidum acetylsalicylicum
- Acimetten
- Acisal
- Acylpyrin
- Adiro
- Adult Aspirin Regimen
- Adult Chewable Aspirin
- Adult Low Dose
- Adult Low Dose Aspirin
- Adult Low Dose Pain Reliever
- Adult Low Strength Aspirin
- Alka rapid
- Alka-Seltzer Original Flavor
- Anadin all night
- Angettes 75
- AquaSource Aspirin Powder
- Aramark Aspirin
- AsCurin Fast Action
- Asacard
- Asagran
- Asaphen
- Asatard
- Ascolong
- Ascriptin (Salt/Mix)
- Ascurin
- Aspalon
- Aspalon (JAN)
- Aspec
- Aspi-cor
- Aspica (Aspirin)
- Aspir Low
- Aspir-Mox
- Aspirdrops
- Aspirin (Standard)
- Aspirin 325
- Aspirin 325mg
- Aspirin 5 Grain
- Aspirin 50 CT
- Aspirin 81
- Aspirin 81 Mg Low Dose
- Aspirin 81mg
- Aspirin 81mg Adult Low Dose
- Aspirin 81mg Dye-Free
- Aspirin 81mg Enteric coated
- Aspirin Adult Low Dose
- Aspirin Bolus
- Aspirin Bolus-240
- Aspirin Chewable
- Aspirin Chewable Low Dose
- Aspirin Delayed Release
- Aspirin EC
- Aspirin Enteric Coated
- Aspirin Enteric Safety Coated
- Aspirin Extra Strength
- Aspirin Liquid Concentrate
- Aspirin Low Dose Chewable
- Aspirin Low Strength
- Aspirin Low Strength, Enteric
- Aspirin Nsaid
- Aspirin Packs
- Aspirin Pain reliver
- Aspirin Powder
- Aspirin Regimen
- Aspirin Regular Strength
- Aspirin form II
- Aspirin granular
- Aspirin tablet 325mg
- Aspirin-PC component aspirin
- AspirinLow Dose
- AspirinLow Dose Low Dose
- Aspirina 03
- Aspirine
- Aspro
- Aspro Clear
- Aspro clr
- Aspropharm
- Asteric
- Azetylsalizylsaeure
- BAYER 500 mg
- BAYER Aspirin Extra Strength
- Basic Care Aspirin
- Bay E4465
- Bayer
- Bayer Aspirin
- Bayer Aspirin 8 Hour
- Bayer Aspirin Regimen
- Bayer Buffered
- Bayer Children's Aspirin
- Bayer Genuine Aspirin
- Bayer Low Dose
- Bayer Plus
- Benaspir
- Benzoic acid, 2-(acetyloxy)-
- Bi-prin
- Bialpirina
- Bialpirinia
- Buffered Aspirin
- Bufferin Arthritis
- CARDIASPIRIN PROTECT
- CAREALL Aspirin
- CODOXY COMPONENT ASPIRIN
- Canine Aspirin
- Caprin
- Cardioaspirin
- Cardioaspirina
- Cemirit
- Chewable Aspirin
- Chewable Aspirin 81mg
- Chewable Aspirin Low Dose
- Chewable Low Dose Aspirin
- Childrens Aspirin
- Chronic Pain/Fever Relief
- Circle K Aspirin 325
- Claradin
- Clariprin
- Clopidogrel Kit
- Coated Aspirin
- Colfarit
- Colsprin
- Contrheuma retard
- Crane Safety Aspirin
- Critical Care Aspirin To Go
- DUOCOVER COMPONENT ASPIRIN
- DUOPLAVIN COMPONENT ASPIRIN
- Danamep
- Decaten
- Delgesic
- Dg Health Aspirin
- Direct Safety Aspirin
- Disprin cv
- Disprin direct
- Dolean pH 8
- Dr. Waynes Aspirin Low Dose
- Duramax
- Durlaza
- Durlaza (TN)
- Durlaza ER
- Dye-Free Aspirin 81
- EQUAGESIC COMPONENT ASPIRIN
- EXCEDRIN COMPONENT ASPIRIN
- Easprin
- Easprin (TN)
- Ecolen
- Ecotrin
- Ecotrin Regular Strength
- Empirin
- Endosprin
- Endydol
- Enprin
- Enteric Aspirin
- Enteric Coated Aspirin
- Entericin
- Enterophen
- Enterosarein
- Enterosarine
- Entrophen
- Equate Aspirin
- Equate Aspirin Chewable
- Equi-Prin
- Extra Strength Aspirin
- Extren
- FIORINAL COMPONENT ASPIRIN
- Family Wellness Pain Reliever
- Fasprin
- Gencardia
- Geritrex Aspirin
- Globentyl
- Globoid
- Good Sense Aspirin
- HEB Effervescent Pain Relief
- Health Mart Aspirin
- Helicon
- Henry Schein Aspirin
- INVAGESIC COMPONENT ASPIRIN
- Idragin
- Istopirin
- Kapsazal
- Kyselina 2-acetoxybenzoova
- Kyselina acetylsalicylova
- LANORINAL COMPONENT ASPIRIN
- Leader Aspirin
- Leader Low Dose Aspirin
- Levius
- Lil Drug Store Aspirin 325
- Low Dose Aspirin
- Low Dose Chewable Aspirin
- Low Dose Miniprin
- Low Strength Chewable Aspirin
- Low dose aspirin 81mg
- MBR Aspirin Bolus 240 Grains
- MBR Aspirin Powder
- MEDIQUE ASPIRN
- MICRAININ COMPONENT ASPIRIN
- Magnecyl
- Max strgh aspro clr
- McKesson Aspirin
- Measurin
- Medi-First Plus Aspirin
- Medi-first Aspirin
- Medique Aspirin
- Medique Products Aspirin
- Medique at Home Aspirin
- Medisyl
- Medpurine
- Micrainin (Salt/Mix)
- Micristin
- Micropirin ec
- Miniasal
- NORGESIC COMPONENT ASPIRIN
- Neuronika
- NobleAid PAIN RELIEVER
- Novid
- Nu-seals
- Nu-seals 300
- Nu-seals 600
- Nu-seals 75
- Nu-seals aspirin
- Nu-seals cardio 75
- O-Acetylsalicylic acid
- ORPHENGESIC COMPONENT ASPIRIN
- PA-32540 component aspirin
- PERCODAN COMPONENT ASPIRIN
- PL2200 component aspirin
- Pain Relief Aspirin
- Pain Relief Aspirin Low Dose
- Pain Reliever
- Paynocil
- Percodan (Salt/Mix)
- Percodan Demi (Salt/Mix)
- Persistin
- Pharbest Aspirin 325mg
- Pharmacin
- Physicians Care Aspirin
- Pirseal
- Platet
- Platet 300
- Plus Pharma
- Plus Pharma Nsaid 325 mg
- Polopirin
- Polopiryna
- Postmi 300
- Postmi 75
- Pravigard PAC (Salt/Mix)
- Premaspin
- Q-GESIC COMPONENT ASPIRIN
- ROBAXISAL COMPONENT ASPIRIN
- ROXIPRIN COMPONENT ASPIRIN
- Rapid Comfort Aspirin
- Rapidol Aspirin
- Rapidol Aspirin Display 2x25
- Regular Strength
- Regular Strength Aspirin
- Regular Strength Aspirin EC
- Rheumintabletten
- Rhodine
- Rhonal
- Ronal
- Rugby Aspirin
- SYNALGOS-DC COMPONENT ASPIRIN
- Salacetin
- Salcetogen
- Saletin
- Salicylic acid acetate
- Salicylic acid, acetyl-
- Salospir
- Salycylacetylsalicylic acid
- Solfrin
- Solprin
- Solprin acid
- Solpyron
- Solves-aspirin
- Solves-aspirin Cherry
- Soma Compound (Salt/Mix)
- Spira-Dine
- St. Joseph
- St. Joseph Aspirin for Adults
- St. Joseph Low Dose Aspirin
- Sunmark Aspirin
- Tasprin
- Temperal
- Thompson Aspirin
- Toldex
- Topcare Aspirin
- Travel Savvy Aspirin
- Tri-buffered Aspirin
- Triple-sal
- ULINE Aspirin
- Unishield Aspirin
- Up and Up Chewable Aspirin
- VALUMEDS ASPIRIN
- VICOPRIN COMPONENT ASPIRIN
- Value Pharma
- Value PharmaPain Reliever
- YOSPRALA COMPONENT ASPIRIN
- Yasta
- ZORprin
- acetyl salicylate
- acide 2-(acetyloxy)benzoique
- aspirin
- aspirin pain relief
- benzoic acid, 2-acetoxy-
- component of Ascodeen-30
- component of Coricidin
- component of Midol
- component of Persistin
- component of Robaxisal
- component of Synirin
- component of Zactirin
- foster and thrive aspirin
- meijer LOW DOSE Aspirin
- o-(Acetyloxy)benzoate
- o-(Acetyloxy)benzoic acid
- o-Acetoxybenzoate
- o-Acetoxybenzoic acid
- o-Carboxyphenyl acetate
- vetality