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
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
25 g | Estimated to ship TODAY | $95.50 |
100 g | Estimated to ship onOctober 09, 2026 | $335.00 |
1 kg | Estimated to ship onOctober 19, 2026 | $2,380.00 |
About This Item
Product Name
Crystal violet (C.I. 42555), indicator ACS,Reag. Ph Eur
grade
ACS reagent
Quality Segment
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 (lambdamax - 15 nm)/E (lambdamax + 15 nm))
storage temp.
2-30°C
SMILES string
[Cl-].N(C)(C)c1ccc(cc1)[C+](c3ccc(cc3)N(C)C)c2ccc(cc2)N(C)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
Analysis Note
Identity (UV/VIS-Spectrum): passes test
Absorbance characteristics (Ratio,E (λmax - 15 nm)/E (λmax + 15 nm)): 0.98 - 1.20
Absorption maximum λmax. (water): 589 - 594 nm
Spec. Absorptivity A 1%/1cm (λmax; 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
1 of 1
This Item | |||
|---|---|---|---|
| description indicator ACS,Reag. Ph Eur | description - | description VETRANAL®, analytical standard | description ACS reagent, ≥90.0% anhydrous basis |
| grade ACS reagent | grade - | grade analytical standard | grade ACS reagent |
| composition dye content, ≥90% spectrophotometric assay (, calc. on dried substance) | composition Dye, ≥88% spectrophotometric assay | composition - | composition - |
| absorbance ratio 0.98-1.20 (Ratio, E (lambdamax - 15 nm)/E (lambdamax + 15 nm)) | absorbance ratio - | absorbance ratio - | absorbance ratio - |
| pH 2.5-3.5 (20 °C, 10 g/L in H2O) | pH 2.5-3.5 (20 °C, 10 g/L in H2O) | pH - | pH 2.5-3.5 (20 °C, 10 g/L) |
| mp 189-194 °C | mp 189-194 °C | mp 205 °C (dec.) (lit.) | mp 205 °C (dec.) (lit.) |
| form solid | form solid | form - | form powder |
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signalword
Danger
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 2 - Eye Dam. 1
Storage Class
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
hcodes
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