Color Developing Agent 3

{{Chembox

|ImageFile=Image:CD-3.svg

|IUPACName = N-[2-(4-amino-N-ethyl-3-methylanilino)ethyl]methanesulfonamide;sulfuric acid

|Section1 ={{Chembox Identifiers

| PubChem = 91578

| CASNo = 25646-71-3

| ChemSpiderID = 82689

| EC_number = 247-161-5

| UNII = KSG4Z13NE0

| DTXSID = DTXSID2027882

| StdInChI=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)

| StdInChIKey = NPDFXFLCEDDWEG-UHFFFAOYSA-N

| SMILES = 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

}}

|Section2 ={{Chembox Properties

|C=24|H=48|N=6|O=16|S=5

}}

|Section7 ={{Chembox Hazards

| GHSPictograms = {{GHS07}}{{GHS09}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|302|317|410}}

| PPhrases = {{P-phrases|261|264|270|272|273|280|301+312|302+352|321|330|333+313|363|391|501}}

}}

|Section8 ={{Chembox Related

|OtherCompounds=Color Developing Agent 1; Color Developing Agent 2; Color Developing Agent 4

}}

}}

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{{cite web |title=Processing EASTMAN EKTACHROME Color ReversalFilms, Module 11Process VNF-1 Specifications |url=https://www.kodak.com/uploadedfiles/motion/h24_11.pdf |website=www.kodak.com |publisher=Eastman Kodak Company |accessdate=22 January 2020 |archive-date=25 March 2020 |archive-url=https://web.archive.org/web/20200325155407/https://www.kodak.com/uploadedfiles/motion/h24_11.pdf |url-status=dead }}

and the E-6 process.