Rhodamine B (C.I. 45170)

Empirical formula C₂₈H₃₁ClN₂O₃
Molar mass (M) 479,02 g/mol
Density (D) 1,31
Melting point (mp)199-201 °C
Solubility 15 g/l (H₂O, 20 °C)
WGK 1
CAS No.[81-88-9]
EG-Nr. 201-383-9

Water-soluble fluorescent dye for detection of acid-fast bacteria (e.g. Mycobacteria) in histological sections, usually in combination with auramine O.

Excitation maximum: 540 nm
Emission maximum: 625 nm

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Hazard statements

H318 Causes serious eye damage
H412 Harmful to aquatic life with long lasting effects

Precautions - prevention

P280 Wear protective gloves / eye protection.

Precautions - response

P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for a long period of time
amount of minutes; remove contact lenses, if possible; keep rinsing.
P310 Immediately call a POISON CENTER / doctor / ....