Acid Fuchsin , BS , 3244-88-0

Synonym(s):
Acid Magenta, Acid Fuchsin;Acid Violet 19;Fuchsin acid;Fuchsin S;Rubine S

CAS NO.：3244-88-0

Empirical Formula: C20H17N3Na2O9S3

Molecular Weight: 585.54

MDL number: MFCD00013286

EINECS: 221-816-5

PRODUCT Properties

• Melting point: >250°C
• Density: 1.74[at 20℃]
• vapor pressure: 0Pa at 25℃
• storage temp.: room temp
• solubility: H2O: soluble1mg/mL
• form: Solid
• Colour Index: 42685
• color: Very dark green
• PH Range: 5(pink)-8(yellow)
• PH: 3-4 (10g/l, H2O, 20℃)
• Water Solubility: 14.3 g/100 mL
• λmax: 546nm
• Merck: 14,107
• BRN: 4111656
• Stability: Stable. Incompatible with strong oxidizing agents.
• Major Application: Nanocomposite, recording materials, sol-gel matrix, decoder system, color filter, inks, paints, markers, highlighters, corrosion inhibitors, explosives, packaging system, textiles, hair dyes, make-up, cosmetics, food storage, dental bleaching, detecting turmor cells, determine bacterial growth, cancer chemopreventive activity
• Biological Applications: Detecting enzyme activity,proteins,tumor cells
• LogP: -9.76
• EPA Substance Registry System: C.I. Acid Violet 19 (3244-88-0)

Description and Uses

Fuchsin acid (Acid magenta) is a red, acid dye of the triphenylmethane series, consisting of the sodium salts of the sulphonic acids of basic fuchsin or of the individual dyes (pararosaniline, rosaniline and new fuchsin), of which the latter is a mixture. The composition of fuchsin acid, like fuchsin basic, can vary with the country of origin and from one manufacturer to another.
Industrial uses of the dye include the colouring of crepe tissues, soap and photographic films and the dyeing of leather, which it penetrates easily.
A 1 % solution of Microme No. 5 in deionized or distilled water (previously adjusted to pH 7-0 with alkali) has a pH of 5-0.
Fuchsin acid is decolorized in solution by the addition of NaOH and in this form it is used as an indicator (known as Andrade's indicator) : this finds application in bacteriology for detecting acid-forming organisms.
Very dilute aqueous solutions of the dye in London tap water (pH about 8-1) fade within two or three seconds. In deionized water they retain their colour considerably longer, however.

Acid Fuchsin has been used in tissue sections for Masson′s trichrome staining. It has been used as a marker to trace ingestion of solutions by green peach aphids.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H335-H315-H319
• Precautionary statements: P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a
• Hazard Codes: Xi
• Risk Statements: 36/37/38
• Safety Statements: 26-36-24/25
• WGK Germany: 3
• RTECS: DD4737000
• TSCA: Yes
• HS Code: 32041200