Phenolphthalein

Also known as: .alpha, alpha.-Di(p-hydroxyphenyl)phthalide, 1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-, 1(3H)-Isobenzofuranone,3,3-bis(4-hydroxyphenyl)-, 2,2-bis(p-hydroxyphenyl)phthalide, 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofurunone, 3,3-Bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one, 3,3-bis(4-hydroxyphenyl)-1(3h)-isobenzofuranon, 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1-one, 5-18-04-00188 (Beilstein Handbook Reference), Chocolax, Colax, EINECS 201-004-7, Evac-Q-Kit, Evac-Q-Kwik, Evac-Q-Tabs, Evac-U-Gen, Evac-V-Lax, Ex-Lax, Feen-A-Mint Laxative Mints, MFCD00005913

Phenolphthalein (CAS 77-09-8) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C20H14O4 and a molecular weight of 318.323 g/mol. Key properties include a melting point of 258-263 °C, a boiling point of 557.8±50.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 206.5±23.6 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H319 — Causes serious eye irritation and H341 — Suspected of causing genetic defects. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.

CAS No.

77-09-8

Jingsj CID

J-36017-7

Molecular Formula

C₂₀H₁₄O₄

Molecular Weight

318.323 g/mol

Category

Alcohols

Last updated

8/21/2026