Supplier Page from Aladdin Scientific Corporation for 1,2,4-Trimethylbenzene
1H-Pyrazole-4-sulfonyl chloride from Aladdin Scientific Corporation
2,6-Dimethylpyrazine from Aladdin Scientific Corporation
Bismuth sulfate from Aladdin Scientific Corporation
N,N'-Di(1-naphthyl)benzidine (purified by sublimation) from Aladdin Scientific Corporation