Article · Wikipedia archive · Last revised May 29, 2026

Color Developing Agent 3

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. 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, ECN-2 and the E-6 process.

Last revised
May 29, 2026
Read time
≈ 1 min
Length
285 w
Citations
4
Source
Wikipedia ↗
Color Developing Agent 3
source ↗
Names
IUPAC name
N-[2-(4-amino-N-ethyl-3-methylanilino)ethyl]methanesulfonamide;sulfuric acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.042.859
EC Number
  • 247-161-5
UNII
  • 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)
    Key: NPDFXFLCEDDWEG-UHFFFAOYSA-N
  • 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
Properties
C24H48N6O16S5
Molar mass 836.97 g·mol−1
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazard
Warning
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 ECN-23 and the E-6 process.4

See also

See also

References

References

  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). www.kodak.com. Eastman Kodak Company. Archived from the original (PDF) on 25 March 2020. Retrieved 22 January 2020.
  3. Processing KODAK Motion Picture Films, Module 7 Process ECN-2 Specifications (PDF). Eastman Kodak Company. 2020. p. 30. Retrieved 12 May 2026.
  4. "Material Safety Data Sheet KODAK PROFESSIONAL, Single-Use Chemistry Kit, Process E-6, Color Developer - Part B" (PDF). freestylephoto.com. Eastman Kodak Company. Retrieved 12 May 2026.