Hermcol®Ko te GH kowhai he kaha, he maataata, he marumaru kaakaariki he poaka diarylide he kowhai 12. He puhui waro me te puhui azo.He poaka kowhai e whakamahia nuitia ana.Kei te whakarōpūtia ano he pigment diarylide, i ahu mai i te 3,3′-dichlorobenzidine.He hononga tata ki te Pigment Yellow 13, ka whakakapihia nga roopu phenyl e rua ki te 2,4-xylyl.He maamaa teitei me te kanapa pai.He nui te rere, he kaha te tae, he iti te pokey.Ko tana whakamahinga matua ko te waituhi whakaheke me te waituhi wai.