Salicylic Acid

An aromatic carboxylic acid, C7H6O3, 138.122 g/mol. Boiling point 211 °C at 2.00E+01 mm Hg, melting point 158 °C, as published.

verified recordOrganic — aromatic carboxylic acid8 measured properties

Identifiers

Molecular formula: C₇H₆O₃
Molecular weight: 138.122 g/mol
Exact mass: 138.031694 g/mol
IUPAC name: 2-hydroxybenzoic acid
SMILES: O=C(O)c1ccccc1O
InChI: InChI=1S/C7H6O3/c8-6-4-2-1-3-5(6)7(9)10/h1-4,8H,(H,9,10)
InChIKey: YGSDEFSMJLZEOE-UHFFFAOYSA-N

Open in ReactionLens Use in reaction prediction

Measured properties

Published measurements, each with its source. Two readings of one property are both shown, in the units each used.

Boiling Point: 211 °C at 2.00E+01 mm Hgmeasured · DrugBank; 211 °C at 20 torrmeasured · Hazardous Substances Data Bank (HSDB)
Melting Point: 315 °F (USCG, 1999)measured · CAMEO Chemicals; 158 °Cmeasured · DrugBank
Density: 1.44 at 68 °F (USCG, 1999) - Denser than water; will sinkmeasured · CAMEO Chemicals; 1.443 g/cu cm at 20 °C/4 °Cmeasured · Hazardous Substances Data Bank (HSDB)
Solubility: 2240 mg/L (at 25 °C)measured · DrugBank; Solubility (weight percent): carbon tetrachloride 0.262 (25 °C); benzene 0.775 (25 °C); propanol 27.36 (21 °C); absolute ethanol 34.87 (21 °C); acetone 396 (23 °C)measured · Hazardous Substances Data Bank (HSDB)
Vapor Pressure: 0.000082 [mmHg]measured · Haz-Map, Information on Hazardous Chemicals and Occupational Diseases; 8.2X10-5 mm Hg at 25 °Cmeasured · Hazardous Substances Data Bank (HSDB)
LogP: 2.26measured · DrugBank; log Kow = 2.26measured · Hazardous Substances Data Bank (HSDB)
Flash Point: 315 °F (157 °C) (closed cup)measured · Hazardous Substances Data Bank (HSDB); 157 °C c.c.measured · ILO-WHO International Chemical Safety Cards (ICSCs)
Refractive Index: Index of refraction: 1.565 at 25 °C/Dmeasured · O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 2006., p. 1438

Calculated properties

Derived from the structure, not from a sample; kept apart from the measurements above.

Molecular weight: 138.12 g/molcalculated · reference compound database; Average mass of one molecule, from reference compound database.
Exact mass: 138.031694049 Dacalculated · reference compound database; Mass of the most common isotopic form.
XLogP3: 2.3calculated · reference compound database; Estimated oil/water partition, computed by reference compound database.
Polar surface area: 57.5 Å²calculated · reference compound database; Polar surface area as computed by reference compound database.
Complexity: 133calculated · reference compound database; A rough measure of how intricate the structure is.
H-bond donors: 2calculated · reference compound database
H-bond acceptors: 3calculated · reference compound database
logP: 1.0904calculated · chemistry engine; Estimated preference for oil over water. Higher means more oil-like.
Topological polar surface area: 57.53 Å²calculated · chemistry engine; Surface area from polar atoms; relates to how easily a molecule crosses membranes.
H-bond donors: 2calculated · chemistry engine; Atoms that can donate a hydrogen bond.
H-bond acceptors: 2calculated · chemistry engine; Atoms that can accept a hydrogen bond.
Rotatable bonds: 1calculated · chemistry engine; Single bonds the molecule can freely twist around.
Molar refractivity: 35.0661 cm³/molcalculated · chemistry engine; Relates to the molecule's polarisability.
Fraction sp³ carbons: 0calculated · chemistry engine; Share of carbon atoms with tetrahedral bonding.
QED drug-likeness: 0.6103calculated · chemistry engine; Quantitative estimate of drug-likeness (0–1).

What it is made of

Elements

C Carbon7 atoms · 60.9% by mass
O Oxygen3 atoms · 34.7% by mass
H Hydrogen6 atoms · 4.4% by mass

Percentages are of the molecular weight above, worked out the same way the molar mass calculator does it.

Structure

Heavy atoms, hydrogen excluded: 10
Total atoms, hydrogen included: 16
Rings: 1
Aromatic rings: 1
Stereocentres: 0
Formal charge: 0

Functional groups

Carboxylic acid
A carbon double-bonded to oxygen and bonded to an –OH group; acidic.
Phenol
An –OH group attached to an aromatic ring.
Aromatic ring
A flat six-membered ring with delocalised electrons.

Matched by structural pattern, not by a measurement.

The molecule in three dimensions

Rotate and inspect the atoms. Loaded only when you ask, so the page stays light.

The drawing above is a diagram of what is bonded to what. A molecule is not flat, and the model here is one low-energy shape generated from the connectivity — useful for seeing which groups can reach each other, and not a measured structure. A real sample is a population of conformations, interconverting.

Reactions it appears in

No documented reaction with a written procedure and a source involves Salicylic Acid yet.

Other names for it

The systematic name on this record is 2-hydroxybenzoic acid.

The sources also call it 2-Hydroxybenzoic acid, o-hydroxybenzoic acid, 2-Carboxyphenol, o-Carboxyphenol, Retarder W, Rutranex, Salonil, Keralyt, Duoplant, Freezone, Saligel.

Structurally related

Molecules sharing this formula, or whose fingerprint is at least 40% similar to this one. Similarity is Tanimoto on Morgan fingerprints over this library only — it is a measure of structural overlap, not of how alike they behave.

1,3-Benzodioxol-4-ol

C7H6O3

Where these values came from

reference compound database338
compound record
chemistry engine
structure perception

compound record.

What this page does not claim

Identifiers are copied from the source record, measured values are reported as published, and calculated values are marked as calculated. Nothing here is a hazard, purity or handling assessment — how the library is checked.