Boric acid
BH3O361.84 g/mol Calculated
Also called hydrogen borate.
The mild antiseptic of old eyewash bottles, and the slow-acting bait that clears a cockroach infestation. It is also a flame retardant in cellulose insulation.
Sources and notes
- The introductionfrom sourceMoleculeFinder curated
- Other namesfrom sourceWikidataIts English label and aliases on Wikidata.
- Formula and weightcomputedPubChem
- 2D drawingcomputedPubChem structure, drawn by RDKit
Where you encounter it
Boric acid on our curated lists, and on the product labels we hold.
Medicines
Household
Garden and pest controlAdded by the maker
Every product and list we hold
Sources and notes
- Our curated lists and their amountsfrom sourceMoleculeFinder curatedEach amount is an editorial figure from our food and drink lists, not a measurement of any one product.
- The product labels and their strengthsfrom sourceDailyMed (FDA label)Each label lists the molecule as an ingredient, and an active ingredient at the strength shown.
- How it gets therefrom sourceMoleculeFinder curatedEach mark is set by hand on our lists, never inferred; a label's ingredient is added by the maker. A row with no mark data says Not marked.
Properties and sources
Calculated by PubChem
- Molecular formula
- BH3O3
- Molecular weight
- 61.84 g/mol
- Polar surface areatopological
- 60.7 Ų
- H-bond donors
- 3
- H-bond acceptors
- 3
- Rotatable bonds
- 0
- Complexity
- 8
Measured LD50, HSDB via PubChem
1,780 mg/kg pure boric acid, mouse, intravenous
An LD50 is an animal study measurement, not a dose for a person.
Reported Hazard label (GHS), ECHA, EU CLP Regulation, Safe Work Australia via PubChem
Danger Health hazard pictogram (GHS08); hazard statements H360
Groups it belongs to
- Category
- Everyday chemistry
- Family
- Inorganic compounds
- Product lists
- Garden and pest control
- Hazard classes
- Health hazard, GHS Danger
- Size
- Under 100 g/mol
SMILES
B(O)(O)OPubChem CID 7628 · Wikidata Q187045 · InChIKey KGBXLFKZBHKPEV-UHFFFAOYSA-N · Data refreshed
Questions
- What is Boric acid?
- The mild antiseptic of old eyewash bottles, and the slow-acting bait that clears a cockroach infestation. It is also a flame retardant in cellulose insulation.
- Where is Boric acid found?
- Boric acid is in these product groups: garden and pest control. from source
- How toxic is Boric acid?
- The reported LD50 of Boric acid is 1,780 mg/kg (mouse, iv). An LD50 is an animal study measurement, not a dose for a person. Its GHS hazard label carries the signal word Danger and the hazard pictogram Health hazard. from sourcefrom source
- What kind of molecule is Boric acid?
- Boric acid has the formula BH3O3 and a molecular weight of 61.84 g/mol. MoleculeFinder files it under inorganic compounds, in the everyday chemistry group. from sourcefrom sourcefrom sourcefrom source
- What else is Boric acid called?
- Boric acid is also called hydrogen borate. from source
Sources and notes
- Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
- LD50from sourceHSDB via PubChemOther values the sources report: mouse, another route, 2,070 mg/kg. The page shows the one LD50 the site uses everywhere.
- Hazard labelfrom sourceECHA, EU CLP Regulation, Safe Work Australia via PubChemThe label combines these classifications.
- ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
- EU CLP Regulationfrom sourceAttributionSource: EUR-Lex, Regulation (EC) No 1272/2008, © European Union.
- Safe Work Australiafrom sourceAttributionSource: Safe Work Australia, Hazardous Chemical Information System, © Commonwealth of Australia, CC BY 4.0.
- Data refreshedfrom sourceMoleculeFinder2026-11-09