Agent Name

1,1-Diphenyl-2-picrylhydrazyl (free radical)

CAS Number

1898-66-4

Formula

C18-H12-N5-O6

Major Category

Nitrogen Compounds

Synonyms

2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl; 2,2-Diphenyl-1-picrylhydrazyl; Diphenylpicrylhydrazyl free radical; DPPH; N,N-Diphenyl-N'-picrylhydrazyl; Hydrazinyl, 2,2-diphenyl-1-(2,4,6-trinitrophenyl)-; Hydrazyl, 2,2-diphenyl-1-(2,4,6-trinitrophenyl)-; Hydrazyl, 2,2-diphenyl-1-picryl- (8CI); [ChemIDplus] 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazinyl; [Merck Index] 1,1-Diphenyl-2-picrylhydrazyl radical; [Sigma-Aldrich MSDS]

Category

Other Aromatics (Nitrogen)

Description

Dark violet solid; [Merck Index] Powder; [Sigma-Aldrich MSDS]

Sources/Uses

Used as an analytical reagent for reducing materials; [Merck Index]

Comments

Intravenous LD50 (mouse) = 1.8 mg/kg; [RTECS] May cause irritation; May cause skin and respiratory sensitization; [Sigma-Aldrich MSDS] Search for (1898-66-4[EC/RN Number]) AND (dermatitis OR allergic OR sensitizer OR sensitization): no reports of sensitization; [PubMed]

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