Formaldehyde

from source

CH2O · 30.026 g/mol

Formic aldehyde · Formaline · Fannoform · Chlodithane

What is Formaldehyde?

The simplest aldehyde, the smell of a biology lab, and the preservative in embalming fluid. It is also a normal trace product of your own metabolism. from source

CategoryEveryday chemistry

Chemical familyAldehydes

LeaderboardsBiggest Deadliest

Fig. 1 · 2D structure RDKit

SMILESC=O

Relative acute toxicity from source

Animal study data · LD50

Reported LD50: 100 mg/kg · moderately toxic
Species: rat
Route: oral

An LD50 describes acute toxicity under experimental conditions and is not a safe or dangerous dose for a person.

Toxicity & hazards

Toxicity · LD50

100 mg/kg · moderately toxic · LD50 rat oral from source

6 more reported values

42 mg/kgLD50 · oral · mouse
800 mg/kgLD50 · oral · rat
16 mg/kgLD50 · other · mouse
87 mg/kgLD50 · iv · rat
300 mg/kgLD50 · other · mouse
420 mg/kgLD50 · other · rat

DangerFlammableCompressed gasCorrosiveToxicIrritantHealth hazardH220, H227, H280, H301, H302, H311, H314, H315, H317, H318, H319, H330, H331, H334, H341, H350, H351, H370, H372, H401, H402, H412from source

Compare with

Formaldehyde vs Acetaldehyde

Sources & methodology

PubChem CID: 712
Wikidata: Q161210
Structure: PubChem → RDKit
LD50: PubChem
Data refreshed: October 19, 2026

How MoleculeFinder sources and labels its data