Basic information
- Name:
2,2'-((4-((2-Hydroxyethyl)amino)-3-nitrophenyl)imino)bisethanol
- CAS No.:
33229-34-4
- Molecular Structure:

- Formula:
- C12H19N3O5
- Molecular Weight:
- 285.34
- Synonyms:
- Ethanol,2,2'-[[4-[(2-hydroxyethyl)amino]-3-nitrophenyl]imino]di- (7CI,8CI);2,2'-[4-(2-Hydroxyethylamino)-3-nitrophenylimino]diethanol;HC Blue 2;HC BlueNo. 2;N,N',N'-Tris(2-hydroxyethyl)-2-nitro-p-phenylenediamine;N1,N4,N4-Tris(2-hydroxyethyl)-2-nitro-p-phenylenediamine;
- EINECS:
- 251-410-3
- Density:
- 1.421 g/cm3
- Melting Point:
- 108-111 °C(lit.)
- Boiling Point:
- 582.7 °C at 760 mmHg
- Flash Point:
- 306.2 °C
- Appearance:
- dark blue to dark brown microcrystalline powder
- Hazard Symbols:
Xi- Risk Codes:
- 36/37/38
- Safety Description:
- 26-36 Details
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Chemistry
Molecular structure of 2,2'-((4-((2-Hydroxyethyl)amino)-3-nitrophenyl)imino)bisethanol (CAS NO.33229-34-4) is:

Product Name: 2,2'-((4-((2-Hydroxyethyl)amino)-3-nitrophenyl)imino)bisethanol
CAS Registry Number: 33229-34-4
IUPAC Name: 2-[4-[bis(2-hydroxyethyl)amino]-2-nitroanilino]ethanol
Molecular Weight: 285.29636 [g/mol]
Molecular Formula: C12H19N3O5
XLogP3-AA: 0.4
H-Bond Donor: 4
H-Bond Acceptor: 7
EINECS: 251-410-3
Melting Point: 108-111 °C(lit.)
Surface Tension: 76.2 dyne/cm
Density: 1.421 g/cm3
Flash Point: 306.2 °C
Enthalpy of Vaporization: 91.62 kJ/mol
Boiling Point: 582.7 °C at 760 mmHg
Vapour Pressure: 2.03E-14 mmHg at 25°C
Product Categories: Alkohols;Amino Alcohols;Organic Building Blocks;Oxygen Compounds
Uses
2,2'-((4-((2-Hydroxyethyl)amino)-3-nitrophenyl)imino)bisethanol (CAS NO.33229-34-4) is used exclusively as a dye in semi-permanent hair coloring products. The concentration of hc blue #2 used in these preparations ranges from 1.6%-2%.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD | oral | > 1gm/kg (1000mg/kg) | KIDNEY, URETER, AND BLADDER: OTHER CHANGES IN URINE COMPOSITION | National Toxicology Program Technical Report Series. Vol. NTP-TR-293, Pg. 1985, |
| rat | LD | oral | > 500mg/kg (500mg/kg) | National Toxicology Program Technical Report Series. Vol. NTP-TR-293, Pg. 1985, |
Safety Profile
Hazard Codes:
Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36:Wear suitable protective clothing.
WGK Germany: 1
RTECS: KL2880000
Specification
2,2'-((4-((2-Hydroxyethyl)amino)-3-nitrophenyl)imino)bisethanol , its cas register number is 33229-34-4. It also can be called Ethanol, 2,2'-((4-((2-hydroxyethyl)amino)-3-nitrophenyl)imino)bis- ; HC Blue #2 ; N1,N4,N4-Tris(2-hydroxyethyl)-2-nitro-p-phenylenediamine ; 3-Nitro-N(sup 1),N(sup 1),N(sup 4)-tris(2-hydroxyethyl)- .It is a dark blue to dark brown microcrystalline powder.It may be sensitive to prolonged exposure to air anfd slow oxidation,alsoit insoluble in water.

