Pigment yellow 185 is an

organic compound In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. The ...

that is used as a green yellow

pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compo ...

and

optical brightener Optical brighteners, optical brightening agents (OBAs), fluorescent brightening agents (FBAs), or fluorescent whitening agents (FWAs), are chemical compounds that absorb light in the ultraviolet and violet region (usually 340-370 nm) of the ...

. It is classified as a derivative of

isoindoline Isoindoline is a heterocyclic organic compound with the molecular formula C8H9N. The parent compound has a bicyclic structure, consisting of a six-membered benzene ring fused to a five-membered nitrogen-containing ring. The compound's structure is ...

. This yellow green compound is prepared by addition of

ammonia Ammonia is an inorganic compound of nitrogen and hydrogen with the formula . A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous was ...

to ''o''-

phthalonitrile Phthalonitrile is an organic compound with the formula C6H4(CN)2, which is an off-white crystal solid at room temperature. It is a derivative of benzene, containing two adjacent nitrile groups. The compound has low solubility in water but is sol ...

to give the diimino

, which in turn condenses first with ''N''-methylcyano

acetamide Acetamide (systematic name: ethanamide) is an organic compound with the formula CH3CONH2. It is the simplest amide derived from acetic acid. It finds some use as a plasticizer and as an industrial solvent. The related compound ''N'',''N''-dimeth ...

and then with

barbituric acid Barbituric acid or malonylurea or 6-hydroxyuracil is an organic compound based on a pyrimidine heterocyclic skeleton. It is an odorless powder soluble in water. Barbituric acid is the parent compound of barbiturate drugs, although barbituric acid ...

.{{cite book , last1=Radtke , first1=Volker , last2=Erk , first2=Peter , last3=Sens , first3=Benno , date=2009 , chapter=Isoindoline pigments , editor1-last=Faulkner , editor1-first=Edwin B. , editor2-last=Schwartz , editor2-first=Russell J. , title=High Performance Pigments , edition=2nd , publisher=Wiley-VCH , pages=221–241 , doi=10.1002/9783527626915.ch14 , isbn=978-3-527-62691-5

References

Pigments Organic pigments Shades of green