Luo, Lin published the artcileStudy on molybdenum blue spectrophotomertric method for determination of trace silicon in high purity hafnium, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Henan Huagong (2015), 32(5), 60-62, database is CAplus.
The research develops a molybdenum blue spectrophotometry in high-purity hafnium trace silicon, using hydrofluoric acid to dissolve the sample, adding boric acid masking fluoride ion. adding ammonium molybdate to react with silicic acid ions formed by the yellow silicon phase heteropolyacid complexes with tartaric acid medium at 1-amino-2-naphthol-4-sulfonic acid, measuring the absorbance and recovery tests. The test results showed that: the method is simple, qual. method, reproducibility, good accuracy, to meet the trace anal. inspection visit silicon requirements.
Henan Huagong published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem