4-Benzyloxy-3-methoxyphenylacetic acid

Also known as: Benzeneacetic acid, 3-methoxy-4-(phenylmethoxy)-, 2-(3-methoxy-4-phenylmethoxyphenyl)acetic acid, NSC 169521, RARECHEM AL BO 1518, MFCD00185562, 4-BENZYLOXY-3-METHOXYPHENYLACETIC ACID

4-Benzyloxy-3-methoxyphenylacetic acid (CAS 29973-91-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H16O4 and a molecular weight of 272.29600 g/mol. Key properties include a melting point of 100-102ºC(lit.), a boiling point of 440.1ºC at 760mmHg, a density of 1.207g/cm3 and a flash point of 162.6ºC. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 29973-91-9
Jingsj CID: J-45316-7
Molecular Formula: C₁₆H₁₆O₄
Molecular Weight: 272.29600 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	100-102ºC(lit.)
Boiling Point	440.1ºC at 760mmHg
Density	1.207g/cm3
Flash Point	162.6ºC
Exact Mass	272.10500
PSA	55.76000
LogP	2.90130
Vapor Pressure	1.61E-08mmHg at 25°C
Refractive Index	1.581

GHS Safety & Compliance

Corrosion / IrritantSignal word: Danger

H302 — Harmful if swallowed
H315 — Causes skin irritation
H318 — Causes serious eye damage
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2918990090
Summary	2918990090. 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 4-Benzyloxy-3-methoxyphenylacetic acid?

The CAS number of 4-Benzyloxy-3-methoxyphenylacetic acid is 29973-91-9.

What are the molecular formula and molecular weight of 4-Benzyloxy-3-methoxyphenylacetic acid?

4-Benzyloxy-3-methoxyphenylacetic acid has molecular formula C16H16O4 and molecular weight 272.29600 g/mol.

Is 4-Benzyloxy-3-methoxyphenylacetic acid hazardous?

4-Benzyloxy-3-methoxyphenylacetic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H318 — Causes serious eye damage.

What are the upstream and downstream products of 4-Benzyloxy-3-methoxyphenylacetic acid?

For 4-Benzyloxy-3-methoxyphenylacetic acid, Upstream Products: trans-4-Benzyloxy-3-methoxy-β-nitrostyrene, Homovanillic acid, 1-(4-(Benzyloxy)-3-methoxyphenyl)ethanone; Downstream Products: Homovanillic acid, 2-(4,5-Dimethoxy-2-nitrophenyl)acetic acid.

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. "4-Benzyloxy-3-methoxyphenylacetic acid (CAS 29973-91-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45316-7 (accessed 2026-11-09).

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