Certificate of Analysis
Product Name
ALIZARIN RED S (pH indicator) (C.I. No.58005)
CAS Number
130-22-3
Molecular Formula
C14H7NaO7S
Catalogue No.
AL00037
Molecular Weight
342.30 g/mol
Batch Number
AL-2026-AL00037
Manufacturing Date
September-2026
Expire Date
September-2031
| Type of Test | Standard | Observed |
|---|---|---|
| Description | Red powder | Red powder |
| Dye Content | Min. 70% | 70% |
| Absorption maximum in 0.1N NaOH ?1max | 553 - 559 nm | 557 nm |
| Absorption maximum 0.1N NaOH ?2max | 592 - 599nm | 595 nm |
| Absorptivity (A1%/1cm at ?1max; 0.0015% in 0.1 N NaOH) | 305 - 480 | 33.7 |
| Absorptivity (A1%/1cm at 595 ?2max; 0.0015% in 0.1 N NaOH) | 330 - 520 | 368.1 |
| Loss on drying (110°C) | <10% | 6.70% |
Tested By
Hitesh Kunjathur
Analysed By
Preeti Rane
