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(S)-(+)-alpha-Methoxyphenylacetic acid

Also known as: (S)-(+)-α-Methoxyphenylacetic acid, (S)-(+)-alpha-Methoxyphenylacetic Acid, O-Methyl-L-mandelic acid, (S)-2-Methoxy-2-phenylacetic acid, (2S)-Methoxy(phenyl)acetic acid

(S)-(+)-alpha-Methoxyphenylacetic acid (CAS 26164-26-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H10O3 and a molecular weight of 166.174 g/mol. Key properties include a melting point of 64-66 °C(lit.), a boiling point of 283.8±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 116.1±15.3 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
26164-26-1
Jingsj CID
J-1497836-0
Molecular Formula
C9H10O3
Molecular Weight
166.174 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point64-66 °C(lit.)
Boiling Point283.8±0.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point116.1±15.3 °C
Exact Mass166.062988
PSA46.53000
LogP1.29
Vapor Pressure0.0±0.6 mmHg at 25°C
Refractive Index1.535

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2918990090
Summary2918990090. other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of (S)-(+)-alpha-Methoxyphenylacetic acid?

The CAS number of (S)-(+)-alpha-Methoxyphenylacetic acid is 26164-26-1.

What are the molecular formula and molecular weight of (S)-(+)-alpha-Methoxyphenylacetic acid?

(S)-(+)-alpha-Methoxyphenylacetic acid has molecular formula C9H10O3 and molecular weight 166.174 g/mol.

Is (S)-(+)-alpha-Methoxyphenylacetic acid hazardous?

(S)-(+)-alpha-Methoxyphenylacetic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of (S)-(+)-alpha-Methoxyphenylacetic acid?

For (S)-(+)-alpha-Methoxyphenylacetic acid, Upstream Products: Methyl 2-methoxy-2-phenylacetate, (S)-(+)-Mandelic acid, Dimethyl sulfate; Downstream Products: (S)-Norepinephrine, Levonordefrin.

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

Last updated:

How to cite: Jingsj. "(S)-(+)-alpha-Methoxyphenylacetic acid (CAS 26164-26-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1497836-0 (accessed 2026-11-09).

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