Diphenic acid
Synonym(s):2,2′-Biphenyldicarboxylic acid;Biphenyl-2,2′-dicarboxylic acid;Diphenic acid, Diphenyl-2,2-dicarboxylic acid
- CAS NO.：482-05-3
- Empirical Formula: C14H10O4
- Molecular Weight: 242.23
- MDL number: MFCD00002464
- EINECS: 207-576-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 05:22:04
What is Diphenic acid?
Chemical properties
Off-white powder
Definition
ChEBI: Diphenic acid is a dicarboxylic acid. It is a conjugate acid of a diphenate(1-). It derives from a hydride of a biphenyl.
Synthesis Reference(s)
Journal of the American Chemical Society, 82, p. 2876, 1960 DOI: 10.1021/ja01496a051
Organic Syntheses, Coll. Vol. 1, p. 222, 1941
Synthesis, p. 731, 1982
Purification Methods
Crystallise diphenic acid from water. Hot Ac2O provides the anhydride below. [Beilstein 9 H 922, 9 IV 3552.]
Properties of Diphenic acid
| Melting point: | 227-229 °C(lit.) |
| Boiling point: | 345.05°C (rough estimate) |
| Density | 1.2695 (rough estimate) |
| refractive index | 1.5389 (estimate) |
| storage temp. | Store below +30°C. |
| solubility | almost transparency in Methanol |
| pka | pKa 3.20(H2O t=23.0) (Uncertain);5.06(H2O t=23.0) (Uncertain) |
| form | powder to crystal |
| color | White to Orange to Green |
| PH | 4-5 (H2O, 20℃) |
| Water Solubility | insoluble (20 ºC) |
| Merck | 14,3310 |
| BRN | 2053625 |
| CAS DataBase Reference | 482-05-3(CAS DataBase Reference) |
| NIST Chemistry Reference | 2,2'-Biphenyldicarboxylic acid(482-05-3) |
| EPA Substance Registry System | [1,1'-Biphenyl]-2,2'-dicarboxylic acid (482-05-3) |
Safety information for Diphenic acid
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
Computed Descriptors for Diphenic acid
| InChIKey | GWZCCUDJHOGOSO-UHFFFAOYSA-N |
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