Acid Yellow 73 (Uranine, Fluorescein Sodium, Soap Yellow)

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PRODUCT SPECIFICATIONS
PRODUCT NAME Acid Yellow 73
SYNONYMS Uranin, Soap Yellow, Fluorescein Sodium, water soluble fluorescein, C.I 45350
CAS No 518-47-8
Color Index No 45350

SPECIFICATIONS

SR. No Criteria Limit/Specification
1. DESCRIPTION Orange Red Powder, Odourless & Hygroscopic
2. L.O.D. AT 105 C. ≤5.0%
3. COMBINED ETHER EXTRACT, % BY MASS MAX. 0.5% Max.
4 DYE INTERMEDIATES, % BY MASS MAX. 2.0 % Max.
5 FLUORESCENCE λ max 460 nm , λ max 515 nm
6 UV ABSORPTION
(E1% in a 1 cm cell in distilled water)
λ max. At 490 nm ± 2 nm
7 ABSORBANCE at λ max.
(of 0.004mg/ml solution in distilled water at 9pH
& 1 cm path length in quartz cuvette)
Between 0.8 to 0.912
8 ASSAY 90.0% Min.
Applications: Acid Yellow 73 is water soluble fluorescent dye. It is mainly used as a tracer dye for leak detections, in detergents and soaps, coolants, etc.
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