Agent Name

5,5'-Dithiobis(2-nitrobenzoic acid)

Alternative Name

Ellman's Reagent

CAS Number

69-78-3

Formula

C14-H8-N2-O8-S2

Major Category

Dyes

Synonyms

Ellman's Reagent; Dithionitrobenzoic acid; 2,2'-Dinitro-5,5'-dithiodibenzoesaeure [German]; 2,2'-Dinitro-5,5'-dithiodibenzoic acid; 3,3'-Dithiobis(6-nitrobenzoic acid); DTNB; Dithiobisnitrobenzoic acid; 3,3'-Dithiobis(6-nitrobenzoic) acid; Benzoic acid, 3,3'-dithiobis(6-nitro-; [ChemIDplus] 6,6'-Dinitro-3,3'-dithiodibenzoic acid; Bis(3-carboxy-4-nitrophenyl) disulfide; 3-Carboxy-4-nitrophenyl disulfide; [Sigma-Aldrich MSDS]

Category

Indicator Dyes

Description

Yellow solid; [Merck Index] Light yellow powder; [Sigma-Aldrich MSDS]

Sources/Uses

Used as an indicator of thiols, cholinesterase, and other enzymes; [Merck Index]

Comments

Intraperitoneal LD50 (mouse) = 2,080 mg/kg; [RTECS] A skin and strong eye irritant; [Sigma-Aldrich MSDS]

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