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paraphenylenediamine
paraphenylenediamine n. 
/parəˌfɛnᵻliːnˌdʌɪˈeɪmiːn/, /parəˌfɛnᵻliːnˌdʌɪˈamiːn/, /ˌpɛrəˌfɛnəˌlinˌdaɪˈeɪˌmin/, /ˌpɛrəˌfɛnəˌlinˌdaɪˈæˌmin/ a white or reddish crystalline compound, C6H4(NH2)2, used as a photographic developer, for dyeing hair and fur, and in the manufacture of dyes; (also) any substituted derivative of this.
Brit. /parəˌfɛnᵻliːnˈdʌɪəmiːn/
, /parəˌfɛnᵻliːnˈdʌɪəmiːn//parəˌfɛnᵻliːnˌdʌɪˈeɪmiːn//parəˌfɛnᵻliːnˌdʌɪˈamiːn/U.S. /ˌpɛrəˌfɛnəˌlinˈdaɪəˌmin/
, /ˌpɛrəˌfɛnəˌlinˈdaɪəˌmin//ˌpɛrəˌfɛnəˌlinˌdaɪˈeɪˌmin//ˌpɛrəˌfɛnəˌlinˌdaɪˈæˌmin/ΘΚΠ
the world > matter > chemistry > organic chemistry > amines > [noun] > diamines
acediamine1858
paraphenylenediamine1873
pentamethylenediamine1883
the world > matter > colour > colouring > colouring matter > [noun] > dye > types of dyes
pallOE
sanders1329
raddlea1350
nutgallc1450
bark1565
logwood1581
sanders-wood1615
catechu1682
cate1698
cachou1708
valonia1722
India wood1742
cutch1759
alizari1769
standard1808
iron buff1836
colorine1838
acid dye1840
garancin1843
French tub1846
suranji1848
morindin1849
water blue1851
union dye1852
indigo-carmine1855
hernant1858
pigment colour1862
rosaniline1862
rose aniline1862
bezetta1863
bottom1863
acid colour1873
paraphenylenediamine1873
indigo-extract1874
tin-pulp1874
phthalein1875
sightening1875
chrome1876
rose bengal1878
azo-colours1879
azine1887
basic dye1892
chromotrope1893
garance1896
ice colour1896
xylochrome1898
cross-dye1901
indanthrene1901
Lithol1903
vat dye1903
thioindigo1906
para red1907
vat colour1912
vat dyestuff1914
indanthrone1920
ionamine1922
Soledon1924
Solochrome1924
Solacet1938
indigoid1939
thioindigoid1943
fluorol1956
Procion1956
society > leisure > the arts > visual arts > photography > chemicals > [noun] > developer
developer1855
paraphenylenediamine1873
rodinal1892
glycin1893
amidol1894
Adurol1898
soup1929
acutance developer1961
1873 Jrnl. Chem. Soc. 26 167 Dinitrobenzene was reduced by means of tin and hydrochloric acid; the bromine was eliminated by the nascent hydrogen and paraphenylenediamine was formed.
1966 L. F. A. Mason Photogr. Processing Chem. i. 25 Although these para~phenylenediamine derivatives are stable in acid solution or as salts in the solid state, the free bases..readily oxidise and are not very soluble.
2003 Occasions Spring 130/1 Many dyes also contain paraphenylenediamines..which, when absorbed through the scalp, can trigger intense itching, headaches, disorders of the immune system and even arthritis.
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