Free lookupCAS 50-21-5

Lactic acid

CAS 50-21-5 · PubChem CID 612 · C3H6O3 · 90.08 g/mol

Also called lactic acid, 2-hydroxypropanoic acid, DL-Lactic acid, 2-hydroxypropionic acid, Milk acid.

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Opens the builder with Lactic acid loaded
as component 1 at 100%.

01GHS classification

Corrosive

Irritant

Signal word

Danger

European Chemicals Agency (ECHA) — fetched 2026-08-28

Precautionary statement codes

P260, P264, P264+P265, P280, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P332+P317, P362+P364, P363, P405, and P501

European Chemicals Agency (ECHA) — fetched 2026-08-28

H314Causes severe skin burns and eye damage

European Chemicals Agency (ECHA) — fetched 2026-08-28

H315Causes skin irritation

European Chemicals Agency (ECHA) — fetched 2026-08-28

H318Causes serious eye damage

European Chemicals Agency (ECHA) — fetched 2026-08-28

02Physical and chemical properties

Appearance

Viscous colourless-to-yellow liquid or colourless-to-yellow crystals.

ILO-WHO International Chemical Safety Cards (ICSCs) — fetched 2026-08-28

Odour

Odorless

Hazardous Substances Data Bank (HSDB) — fetched 2026-08-28

Melting point

17 °C

ILO-WHO International Chemical Safety Cards (ICSCs) — fetched 2026-08-28

Boiling point

122 °C at 15 mm Hg

Hazardous Substances Data Bank (HSDB) — fetched 2026-08-28

Flash point

110 °C c.c.

ILO-WHO International Chemical Safety Cards (ICSCs) — fetched 2026-08-28

Auto-ignition temperature

no value printed

unsourced — inference candidate

Flammable limits

no value printed

unsourced — inference candidate

Vapour pressure

0.0813 mm Hg at 25 °C

Hazardous Substances Data Bank (HSDB) — fetched 2026-08-28

Relative density

Relative density (water = 1): 1.2

ILO-WHO International Chemical Safety Cards (ICSCs) — fetched 2026-08-28

Solubility in water

Solubility in water: miscible

ILO-WHO International Chemical Safety Cards (ICSCs) — fetched 2026-08-28

Partition coefficient, log Kow

-0.6

ILO-WHO International Chemical Safety Cards (ICSCs) — fetched 2026-08-28

Viscosity

no value printed

unsourced — inference candidate

03Toxicological information

No published acute toxicity value was found for this substance in the sources we read. On a document, Section 11 would print unsourced — inference candidate rather than an estimate.

This page is the evidence. The document is the deliverable.

Everything above is free and stays free. For $5 the same sourced values are assembled into a 16-section safety data sheet and a print-ready GHS label carrying your company details in Section 1.

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What we read

European Chemicals Agency (ECHA), ILO-WHO International Chemical Safety Cards (ICSCs), Hazardous Substances Data Bank (HSDB).

25 sourced records for this substance are in the ledger. Values dated more than 30 days ago are re-fetched on the next document.

04Also in the ledger

Browse every chemical in the ledger · What a GHS safety data sheet contains