85-77-8 Usage
General Description
5-amino-8-[(p-aminophenyl)azo]naphthalene-2-sulphonic acid is a synthetic chemical compound commonly used as a pH indicator in various laboratory applications. Its molecular formula is C16H13N3O3S and it is typically a red to brown powder. The compound is water soluble and its solubility remains almost constant over a wide pH range. Due to its azo group, it is commonly used in the determination of trace amounts of various metal ions and as a colorant in the textile industry. The compound can also be used in the production of dyes, pigments and other chemical products.
Check Digit Verification of cas no
The CAS Registry Mumber 85-77-8 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 5 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 85-77:
(4*8)+(3*5)+(2*7)+(1*7)=68
68 % 10 = 8
So 85-77-8 is a valid CAS Registry Number.
InChI:InChI=1/C16H14N4O3S/c17-10-1-3-11(4-2-10)19-20-16-8-7-15(18)13-6-5-12(9-14(13)16)24(21,22)23/h1-9H,17-18H2,(H,21,22,23)/b20-19+
