Certificate of Analysis
Product Name
ALIZARIN RED S AR (pH indicator) (C.I. No.58005)
CAS Number
130-22-3
Molecular Formula
C14H7NaO7S
Catalogue No.
AL0037A
Molecular Weight
342.30 g/mol
Batch Number
AL-2026-AL0037A
Manufacturing Date
September-2026
Expire Date
September-2031
| Type of Test | Standard | Observed |
|---|---|---|
| Description | Red powder | Red powder |
| Dye content (by spectrophotometry on dried substance) | Min. 80.0% | 80.00% |
| Transition range pH 4.3-6.3 | Brilliant yellow to pink | Brilliant yellow to pink |
| Transition range pH 9.4-12.0 | Brown orange to violet | Brown orange to violet |
| Absorption maximum in 0.1N NaOH ?1max | 553 - 559 nm | 554 nm |
| Absorption maximum 0.1N Absorption maximum 0.1N | 592 - 599nm | 594 nm |
Tested By
Hitesh Kunjathur
Analysed By
Preeti Rane
