Solvent Red 41

Synonym(s):Fuchsin Basic;Rosanilin, AFB

CAS NO.：3248-93-9
Empirical Formula: C20H19N3
Molecular Weight: 301.39
MDL number: MFCD00055278
EINECS: 221-832-2
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 03:29:48

What is Solvent Red 41?

Definition

ChEBI: An imine that is 4-methylidenecyclohexa-2,5-dien-1-imine in which the hydrogens of the methylidene group are replaced by 4-aminophenyl and 3-methyl-4-aminophenyl groups. The monohydrochloride salt is the histological dye 'rosanilin'.

Preparation

(a) aniline, p-Methylaniline and O-Methylaniline Triethylamine hydrochloride and its mixture and 1-Nitrobenzene or 1-Nitrobenzene and 1-Methyl-2-nitrobenzene mixture, iron and Zinc chloride in the presence of heating (Zinc chloride method); (b) aniline,?p-Methylaniline?and?O-Methylaniline?mixture and Arsenic acid?heating (Arsenic acidmethod).

Properties and Applications

brilliant blue light red (6-Amino-4-hydroxynaphthalene-2-sulfonic acid ). Soluble in water for red light purple, soluble in ethanol to red. In concentrated sulfuric acid for yellow brown solution, dilute almost colorless. Dye aqueous solution to join sodium hydroxide colorless, have red precipitation.

Standard	Light Fastness	Heat-resistant(℃)		water	Sodium Carbonate(5%)	Hydrochloric acid(5%)
		Melting point	Stable
ISO	Poor		60	Well	Poor	Poor

Properties of Solvent Red 41

Melting point:	268-270°C decomposes
Boiling point:	432.52°C (rough estimate)
Density	1.0962 (rough estimate)
refractive index	1.6000 (estimate)
storage temp.	Store at +15°C to +30°C.
Colour Index	42510
pka	6.81±0.20(Predicted)
PH	5-6 (1g/l, H2O, 25°C)
EPA Substance Registry System	Benzenamine, 4-[(4-aminophenyl)(4-imino-2,5-cyclohexadien-1-ylidene)methyl]-2-methyl- (3248-93-9)