Color Developing Agent 4

{{Chembox

|ImageFile=Image:CD-4.svg

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

|Section1={{Chembox Identifiers

| PubChem = 91579

| CASNo = 25646-77-9

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = BS668SJ6PT

| EC_number = 247-162-0

| ChemSpiderID = 82690

| StdInChI=1S/C11H18N2O.H2O4S/c1-3-13(6-7-14)10-4-5-11(12)9(2)8-10;1-5(2,3)4/h4-5,8,14H,3,6-7,12H2,1-2H3;(H2,1,2,3,4)

| StdInChIKey = GVEYRUKUJCHJSR-UHFFFAOYSA-N

| SMILES = CCN(CCO)C1=CC(=C(C=C1)N)C.OS(=O)(=O)O

}}

|Section2={{Chembox Properties

|C=11|H=20|N=2|O=5|S=1

}}

|Section7={{Chembox Hazards

| GHSPictograms = {{GHS06}}{{GHS07}}{{GHS08}}{{GHS09}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|301|317|373|410}}

| PPhrases = {{P-phrases|260|261|264|270|272|273|280|301+310|302+352|314|321|330|333+313|363|391|405|501}}

}}

|Section8={{Chembox Related

|OtherCompounds=Color Developing Agent 1; Color Developing Agent 2; Color Developing Agent 3

}}

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The fourth in the series of color developing agents used in developing color films, commonly known as CD-4, is chemically known as 4-(N-Ethyl-N-2-hydroxyethyl)-2-methylphenylenediamine sulfate. 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.