White to buff powder. Essentially insoluble as free acid; soluble as sodium or ammonium salt.
Intermediate for azo pigments.
2-Amino-4-chloro-5-methylbenzenesulfonic Acid is used in method for preparing environment-friendly organic pigment for agricultural seed coating.
The compound is made by baking 3-chloro-4-methyl-benzeneamine hydrogensulfate in vacuo at 195 ℃.
[1] Patent: KR2015/104064, 2015, A. Location in patent: Paragraph 0161-0165
[2] Patent: KR2016/92961, 2016, A. Location in patent: Paragraph 0151-0159
[3] Patent: DE175378,