Borax

from source

B4Na2O7 · 201.2 g/mol

sodium borate · sodium tetraborate · disodium tetraborate · sodium borate decahydrate

What is Borax?

The laundry booster and household cleaner mined from dried lake beds. It is a salt of boric acid and one of the oldest cleaning agents still sold. from source

CategoryEveryday chemistry

LeaderboardsBiggest Deadliest

Fig. 1 · 2D structure RDKit

SMILESB1(OB2OB(OB(O1)O2)[O-])[O-].[Na+].[Na+]

Where you'll find it

Household cleanerswhat else is in it →

Curated by MoleculeFinder from source

Relative acute toxicity from source

Animal study data · LD50

Reported LD50: 2,660 mg/kg · very low toxicity
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

2,660 mg/kg · very low toxicity · LD50 rat oral from source

1 more reported value

1,055 mg/kgLD50 · dermal · rabbit

DangerIrritantHealth hazardH302, H315, H319, H320, H335, H360, H370, H372, H373, H402, H412from source

Compare with

Borax vs Sodium bicarbonate

Sources & methodology

PubChem CID: 10219853
Wikidata: Q5319
Structure: PubChem → RDKit
LD50: PubChem
Everyday relationships: MoleculeFinder editorial curation
Data refreshed: September 13, 2026

How MoleculeFinder sources and labels its data