Color Developing Agent 1

{{Chembox | ImageFile=Diethyl-p-phenylenediamine.svg | PIN = ''N''1,''N''1-Diethylbenzene-1,4-diamine | OtherNames = ''N'',''N''-diethyl-p-phenylenediamine DPD |Section1={{Chembox Identifiers | PubChem = 7120 | CASNo = 93-05-0 | EC_number = 202-214-1 | ChEMBL = 1452158 | ChemSpiderID = 13839884 | UNNumber = 1673 | UNII = 0QQA4DFV2J | DTXSID = DTXSID2025058 | StdInChI=1S/C10H16N2/c1-3-12(4-2)10-7-5-9(11)6-8-10/h5-8H,3-4,11H2,1-2H3 | StdInChIKey = QNGVNLMMEQUVQK-UHFFFAOYSA-N | SMILES = CCN(CC)C1=CC=C(C=C1)N }} |Section2={{Chembox Properties | C=10|H=16|N=2 }} |Section7={{Chembox Hazards | GHSPictograms = {{GHS05}}{{GHS06}} | GHSSignalWord = Danger | HPhrases = {{H-phrases|301|314}} | PPhrases = {{P-phrases|260|264|270|280|301+310|301+330+331|303+361+353|304+340|305+351+338|310|321|330|363|405|501}} }} |Section8={{Chembox Related |OtherCompounds= Color Developing Agent 2; Color Developing Agent 3; Color Developing Agent 4;

}} }}

'''Color Developing Agent 1''' ('''CD-1''') is the first in the series of color developing agents used in developing color films. It is the organic compound ''N'',''N''-diethyl-1,4-benzenediamine (DPD), which is usually in the form of the monohydrochloride salt.<ref name="CD1"/> 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.

Arthur Thomas Palin, a Fellow of the Royal Society of Chemistry, developed a widely used color based method of water testing using DPD to indicate the chlorine content of treated water.

==References== <references>

<ref name="CD1">{{cite web | title = 1,4-Benzenediamine, N,N-diethyl-, monohydrochloride | url = https://pubchem.ncbi.nlm.nih.gov/compound/75145 | website = U.S. National Center for Biotechnology Information | accessdate =21 January 2020}}</ref>

</references>

Category:Photographic chemicals Category:4-Aminophenyl compounds Category:Diethylamino compounds