Agent Name

1-Hydroxybenzotriazole

CAS Number

2592-95-2

Formula

C6-H5-N3-O

Major Category

Nitrogen Compounds

Synonyms

1H-Benzotriazole, 1-hydroxy-; [ChemIDplus] 1-Hydroxy-1H-benzotriazole; Benzazimidol; N-hydroxybenzotriazole; HOBt; [Merck Index] UN0508

Category

Triazoles

Description

White solid; [Merck Index] Light yellow fine crystals with lumps; [Sigma-Aldrich MSDS]

Sources/Uses

Used as a reagent in synthetic organic chemistry; [Merck Index]

Comments

A mild eye irritant; Causes somnolence and weight loss in oral lethal-dose studies of rats; [RTECS] May explode on heating; [Merck Index] Explosion hazard; An eye irritant; [Sigma-Aldrich MSDS] See "1-Hydroxybenzotriazole hydrate."

Exposure Assessment
Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Explosives - Division 1.1, 1.2, 1.3, or 1.5."

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Other Information

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