Phthalide

Also known as: 1(3H)-4,5,6,7-tetrachloroisobenzofuranone, 1(3H)-Isobenzofuranone, 1-Isobenzofuranone, 1H-Isobenzofuran-3-one, 2-Benzofuran-1(3H)-one, 2-Hydroxymethylbenzoic acid, γ-lactone, 2-benzofuran-1(3H)-one, 3-oxo-1,3-dihydro-isobenzofuran, 4,5,6,7-TETRACHLOROPHTHALIDE, 4,5,6,7-Tetrachlor-phthalid, 4,5,6,7-Tetrachlorophthalidefthalide, 4,5,6,7-tetrachloro-1(3H)-isobenzofuranone, 4,5,6,7-tetrachloroisobenzofuran-1(3H)-one, 5-17-10-00007 (Beilstein Handbook Reference), EINECS 201-744-0, Fthalide, Isobenzofuranone, KF-32, MFCD00005906, PHH

Phthalide (CAS 87-41-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H6O2 and a molecular weight of 134.132 g/mol. Key properties include a melting point of 71-74 °C(lit.), a boiling point of 290.0±0.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 124.8±22.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 87-41-2
Jingsj CID: J-38335-2
Molecular Formula: C₈H₆O₂
Molecular Weight: 134.132 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	71-74 °C(lit.)
Boiling Point	290.0±0.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	124.8±22.2 °C
Exact Mass	134.036774
PSA	26.30000
LogP	0.99
Vapor Pressure	0.0±0.6 mmHg at 25°C
Refractive Index	1.585
Additional Property	sparingly soluble

Activity & Biological Data

Additional Information	[1]. Liu Zeng Chen, et al. Novel phthalide derivatives: Synthesis and anti-inflammatory activity in vitro and in vivo. Eur J Med Chem. 2020 Nov 15;206:112722. [2]. Chakapong Intaraudom, et al. Antimicrobial drimane - phthalide derivatives from Hypoxylon fendleri BCC32408. Fitoterapia. 2019 Oct;138:104353. [3]. Xin Fang, et al. Synthesis of phthalide derivatives and evaluation on their antiplatelet aggregation and antioxidant activities. J Asian Nat Prod Res. 2020 Dec;22(12):1176-1187.

Additional Information

[1]. Liu Zeng Chen, et al. Novel phthalide derivatives: Synthesis and anti-inflammatory activity in vitro and in vivo. Eur J Med Chem. 2020 Nov 15;206:112722. [2]. Chakapong Intaraudom, et al. Antimicrobial drimane - phthalide derivatives from Hypoxylon fendleri BCC32408. Fitoterapia. 2019 Oct;138:104353. [3]. Xin Fang, et al. Synthesis of phthalide derivatives and evaluation on their antiplatelet aggregation and antioxidant activities. J Asian Nat Prod Res. 2020 Dec;22(12):1176-1187.

Customs & Trade Information

HS Code	2932209090
Summary	2932209090. other lactones. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Phthalide?

The CAS number of Phthalide is 87-41-2.

What are the molecular formula and molecular weight of Phthalide?

Phthalide has molecular formula C8H6O2 and molecular weight 134.132 g/mol.

What are the upstream and downstream products of Phthalide?

For Phthalide, Upstream Products: 3-Chlorophthalide, o-xylene, 2-Iodobenzyl alcohol; Downstream Products: Isoxepac, 2,3-Dihydro-2-phenyl-1H-isoindol-1-one, 6-Aminophthalide.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Phthalide (CAS 87-41-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38335-2 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.