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4-Hydroxyphenoxyacetic Acid

Also known as: (4-Hydroxyphenoxy)acetic acid, 2-(4-Hydroxyphenoxy)acetic acid, 4-(Carboxymethoxy)phenol, p-Hydroxyphenoxyacetic acid, Acetic acid, 2-(4-hydroxyphenoxy)-, Hydroquinone monoacetic acid, Hydrochinon-mono-glykolsaeure, MFCD00014362

4-Hydroxyphenoxyacetic Acid (CAS 1878-84-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H8O4 and a molecular weight of 168.14700 g/mol. Key properties include a melting point of 154-157 °C(lit.), a boiling point of 372.6ºC at 760mmHg, a density of 1.367g/cm3 and a flash point of 158.3ºC. 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.
1878-84-8
Jingsj CID
J-8962-3
Molecular Formula
C8H8O4
Molecular Weight
168.14700 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point154-157 °C(lit.)
Boiling Point372.6ºC at 760mmHg
Density1.367g/cm3
Flash Point158.3ºC
Exact Mass168.04200
PSA66.76000
LogP0.85560
Vapor Pressure3.27E-06mmHg at 25°C

GHS Safety & Compliance

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

Frequently Asked Questions

What is the CAS number of 4-Hydroxyphenoxyacetic Acid?

The CAS number of 4-Hydroxyphenoxyacetic Acid is 1878-84-8.

What are the molecular formula and molecular weight of 4-Hydroxyphenoxyacetic Acid?

4-Hydroxyphenoxyacetic Acid has molecular formula C8H8O4 and molecular weight 168.14700 g/mol.

Is 4-Hydroxyphenoxyacetic Acid hazardous?

4-Hydroxyphenoxyacetic 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 4-Hydroxyphenoxyacetic Acid?

For 4-Hydroxyphenoxyacetic Acid, Upstream Products: Methyl 2-(4-hydroxyphenoxy)acetate, Chloroacetic acid, Hydroquinone; Downstream Products: Methyl 2-(4-hydroxyphenoxy)acetate, 2-(3,5-dibromo-4-hydroxyphenoxy)acetic acid, 2,2'-(1,4-Phenylenebis(oxy))diacetic acid.

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

Last updated:

How to cite: Jingsj. "4-Hydroxyphenoxyacetic Acid (CAS 1878-84-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8962-3 (accessed 2026-11-09).

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