CERTIFICATE OF ANALYSIS

Product Name	SUDAN BLACK B For Microscopy	CAS Number	4197-25-5
Molecular Formula	C 29 H 24 N 6	Catalogue No.	AL4387
Molecular Weight	456.55	Batch Number
Manufacturing Date	December-2020	Expire Date	November-2025

TYPE OF TEST	STANDARD	OBSERVED
Description Dye content Absorption maxima (in 95% ethanol) Absorptivity A1%/1cm in 95% ethanol at ? max Abs. ratio (A ? max – 15 nm/ A ? max + 15 nm) Loss on drying (50°C/0.05mm Hg) Suitability for microbiology	Black powder (Min.) 60.0% 596 - 605nm Min. 350 0.98 – 1.02 <5.0% Passes test	Black powder 61.1% 598 nm 358 1 <5.0% Passes test

Result: The above product complies with LR grade

Tested By
Hitesh Kunjathur

Analysed By
Preeti Rane