Pharmaceutical ingredients

Paracetamol vs ibuprofen

Paracetamol (C8H9NO2, CAS 103-90-2) and ibuprofen (C13H18O2, CAS 15687-27-1) are both listed under analgesics and anti-inflammatories.

Paracetamol has a molar mass of 151.17 g/mol, ibuprofen 206.29 g/mol.

Measured melting points are 168 °C for paracetamol and 75 to 77 for ibuprofen.

Both carry the GHS signal word Warning.

On CompoundList, 360 suppliers list paracetamol and 268 suppliers list ibuprofen.

Data last updated 7 October 2026

Paracetamol and ibuprofen compared side by side
Identity
	Paracetamol	Ibuprofen
Name in our database	Acetaminophen	(±)-Ibuprofen
CAS number	103-90-2	15687-27-1
Molecular formula	C₈H₉NO₂	C₁₃H₁₈O₂
Molar mass	151.17 g/mol	206.29 g/mol
IUPAC name	N-(4-hydroxyphenyl)acetamide	2-[4-(2-methylpropyl)phenyl]propanoic acid
EC number	203-157-5	239-784-6
Physical properties
Appearance	Large monoclinic prisms from water	Colorless, crystalline stable solid
Melting point	168 °C	75 to 77
Boiling point	>500	Not recorded
Density	1.293 g/cm³ at 21 °C	Not recorded
Solubility	In water, 14,000 mg/L at 25 °C	In water, 21 mg/l @ 25 °C
LogP (octanol/water)Computed from the structure	1.35	3.07
Safety (GHS)
Signal word	Warning	Warning
Pictograms
Hazard statements	H302 Harmful if swallowed. H315 Causes skin irritation. H319 Causes serious eye irritation. H412 Harmful to aquatic life with long lasting effects.	H302 Harmful if swallowed. H319 Causes serious eye irritation. H335 May cause respiratory irritation. H361 Suspected of damaging fertility or the unborn child.
Uses and classification
Uses and functions	Analgesics and antipyretics Anti-inflammatories Skin conditioning agents Analgesic Anti-arrhythmia drug Anti-inflammatory agent	Analgesics and antipyretics Anti-inflammatories Skin conditioning agents Analgesic Anti-inflammatory agent Anti-ulcer drug
Category	Pharmaceuticals and APIs › Analgesics and anti-inflammatories	Pharmaceuticals and APIs › Analgesics and anti-inflammatories
HS code	292429Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other	291639Aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and…
Market on CompoundList
Suppliers	360 suppliers	268 suppliers
Supplier countries	60 countries, most in India, China, United States	48 countries, most in India, United States, China
Price rangeOnly prices set by suppliers who manage their own profile	Price on request	Price on request

Measured and computed values as shown on each chemical page, plus live listings on CompoundList. Details may have changed, please confirm them with the supplier. Safety data is a summary, not an SDS.

Paracetamol

Ibuprofen

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