Color Developing Agent 3

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Color Developing Agent 3
IUPAC name
N-[2-(4-amino-N-ethyl-3-methylanilino)ethyl]methanesulfonamide;sulfuric acid
3D model (JSmol)
ECHA InfoCard 100.042.859 Edit this at Wikidata
EC Number
  • 247-161-5
  • InChI=1S/2C12H21N3O2S.3H2O4S/c2*1-4-15(8-7-14-18(3,16)17)11-5-6-12(13)10(2)9-11;3*1-5(2,3)4/h2*5-6,9,14H,4,7-8,13H2,1-3H3;3*(H2,1,2,3,4)
  • CCN(CCNS(=O)(=O)C)C1=CC(=C(C=C1)N)C.CCN(CCNS(=O)(=O)C)C1=CC(=C(C=C1)N)C.OS(=O)(=O)O.OS(=O)(=O)O.OS(=O)(=O)O
Molar mass 836.97 g·mol−1
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
H302, H317, H410
P261, P264, P270, P272, P273, P280, P301+P312, P302+P352, P321, P330, P333+P313, P363, P391, P501
Related compounds
Related compounds
Color Developing Agent 1; Color Developing Agent 2; Color Developing Agent 4
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

The third in the series of color developing agents used in developing color films, commonly known as CD-3, is chemically known as N-[2-[(4-Amino-3-methylphenyl)ethylamino]ethyl]methanesulfonamide Sesquisulfate Monohydrate.[1] In color development, after reducing a silver atom in a silver halide crystal, the oxidized developing agent combines with a color coupler to form a color dye molecule. CD-3 is used in many processes including VNF-1[2] and the E-6 process.

See Also[edit]


  1. ^ "Methanesulfonamide, N-[2-[(4-amino-3-methylphenyl)ethylamino]ethyl]-, sulfate (2:3)". U.S. National Center for Biotechnology Information. Retrieved 7 April 2019.
  2. ^ "Processing EASTMAN EKTACHROME Color ReversalFilms, Module 11Process VNF-1 Specifications" (PDF). Eastman Kodak Company. Archived from the original (PDF) on 25 March 2020. Retrieved 22 January 2020.