1.01408

Crystal violet (C.I. 42555)

pH indicator, ACS, Reag. Ph Eur

• Synonym(s): Crystal violet (C.I. 42555), Hexamethylenepararosaniline chloride, Gentian violet (C.I. 42555), Hexamethyl-p-rosanilinium, Methyl violet 10 B
• Empirical Formula (Hill Notation): C₂₅H₃₀ClN₃
• CAS Number: 548-62-9
• Molecular Weight: 407.98
• MDL number: MFCD00011750
• UNSPSC Code: 41116130
• EC Index Number: 208-953-6
• NACRES: NA.21

Properties

• product name: Crystal violet (C.I. 42555), indicator ACS,Reag. Ph Eur
• grade: ACS reagent
• Quality Level: 200
• agency: reag. Ph. Eur.
• form: solid
• potency: 420 mg/kg LD₅₀, oral (Rat)
• composition: dye content, ≥90% spectrophotometric assay (calc. on dried substance)
• impurities: <0.10% Michler′s ketone
• loss: ≤7.5% loss on drying, 110°C, 4 h
• pH: 2.5-3.5 (20 °C, 10 g/L in H₂O)
• mp: 189-194 °C
• solubility: 10 g/L
• density: 1.19 g/cm³ at 20 °C
• bulk density: 220‑400 kg/m³
• λmax: 589-594 nm in water
• absorbance ratio: 0.98-1.20 (Ratio, E (lambda_max - 15 nm)/E (lambda_max + 15 nm))
• storage temp.: 2-30°C
• InChI: 1S/C25H30N3.ClH/c1-26(2)22-13-7-19(8-14-22)25(20-9-15-23(16-10-20)27(3)4)21-11-17-24(18-12-21)28(5)6;/h7-18H,1-6H3;1H/q+1;/p-1
• InChI key: ZXJXZNDDNMQXFV-UHFFFAOYSA-M

Description

Analysis Note

Dye content (spectrophotometrically; calc. on dried substance): ≥ 90.0%
Identity (UV/VIS-Spectrum): passes test
Absorbance characteristics (Ratio,E (λmax - 15 nm)/E (λmax +  15 nm)): 0.98 - 1.20
Absorption maximum λ_max. (water): 589 - 594 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.002 g/l; water): 2000 - 2450
TLC-Test: passes test
Michler`s ketone: <0.10%
Loss on drying (110 °C, 4 h): ≤ 7.5%
Suitability as indicator (ACS): passes test
Suitability as indicator (Reag. Ph. Eur.): passes test

Safety Information

• pictograms: GHS05,GHS07,GHS08,GHS09
• signalword: Danger
• hcodes: H302 - H318 - H351 - H410
• pcodes: P202 - P273 - P280 - P301 + P312 - P305 + P351 + P338 - P308 + P313
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 2 - Eye Dam. 1
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable