Rhodamine B CAS 81-88-9 Basic Violet 10 C. I. 45170

• CAS No.: 81-88-9
• Formula: C28h31n2o3.Cl
• EINECS: 201-383-9
• Classification: Organic Analytical Reagents
• Grade: AR
• Specific Usage: For Synthesis
• Model NO.: SUREST-121
• Content: Standard
• Usage: Laboratory Reagents, Analytical Reagents, Diagnostic Reagents, Teaching Reagents
• Source: Dry Powder
• Habit Appellation: Special Reagent
• Application: Industry, Scientific Research, Health, Environmental Protection, Agriculture
• Property: Organic Reagent
• Shelf Life: 2 Years
• Stock: Available
• Molecular Weight: 479.02
• Color: Fuchsia
• Melting Point: 210-211 ºC (DEC.)
• Water Solubility: Soluble
• Transport Package: 25kg /Drum
• Specification: 98%min
• Trademark: Surest
• Origin: China
• HS Code: 3204199000
• Production Capacity: 1000 Tons Yearly

Product Description

Rhodamine B

Name	Rhodamine B
Synonyms	Basic Violet 10; C.I. 45170; 9-(2-Carboxyphenyl)-3,6-bis(diethylamino)xanthylium chloride
Molecular Structure
Molecular Formula	C28H31N2O3^.Cl
Molecular Weight	479.02
CAS Registry Number	81-88-9
EINECS	201-383-9

Properties

Melting point	210-211 ºC (dec.)
Water solubility	SOLUBLE

Chemical Property/Description

Green crystal or reddish purple powder, soluble in water, ethanol, slightly soluble in  solution; The aqueous solution is blue-red and has strong fluorescence after dilution. The aqueous solution is rose-red when  is added, and flocculation precipitates after heating. Yellowish brown in concentrated sulfuric acid with strong green fluorescence, scarlet in dilution, then blu-red to orange. The alcohol solution is red fluorescence, the maximum absorption wavelength is 554nm, the maximum fluorescence wavelength is 610nm, the peak laser wavelength is 610nm, and the tuning range is 578~610nm.


Main Uses:

Photometric determination of gold, antimony (V), thallium (III), fluorescence determination of manganese, cobalt, etc; REDOX indicator used to titrate tin, antimony, niobium, tantalum precipitant, biological dye series laser dyes.

In the cosmetics industry, it can be used for the coloring of bath liquid, shampoo, cold water and other products, but it should not be used in eye, mouth and lip cosmetics.