Basic information
- CAS
6041-94-7- Standard SMILES
O=C(Nc1ccccc1)c1cc2ccccc2c(N=Nc2cc(Cl)ccc2Cl)c1O- InChIKey
HXJSTOXKASOAQW-UHFFFAOYSA-N- Molecular formula
- C23H15Cl2N3O2
- Average molar mass
- 436.3 g/mol
- Monoisotopic mass
- 435.0541321
Overview
Yellowish red solid with a tint of pink or dark red powder. (NTP, 1992)
Names & identifiers
- Preferred name
- Pigment Red 2
- IUPAC
- 4-[(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenylnaphthalene-2-carboxamide
- English name
- Pigment Red 2
- Molecular formula
- C23H15Cl2N3O2
- Molecular weight
- 436.29
Names & synonyms
CCRIS 6092EINECS 227-930-14-[(2,5-Dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamideDTXSID3025914EC 227-930-12-Naphthalenecarboxamide, 4-((2,5-dichlorophenyl)azo)-3-hydroxy-N-phenyl-2-Naphthalenecarboxamide, 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenyl-4-((2,5-Dichlorophenyl)azo)-3-hydroxy-N-phenylnaphthalene-2-carboxamide2-Naphthalenecarboxamide, 4-(2-(2,5-dichlorophenyl)diazenyl)-3-hydroxy-N-phenyl-227-930-12-Naphthalenecarboxamide, 4-[2-(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-SILOPOL RED R
Show more names
c.i. 12310FASTREDF2RCONFASTRED2RPigment Red 2IRGALITEREDFBSCIPIGMENTRED2RIRGALITEREDFBXC.I.PIGMENTRED2Fast Scarlet F2R
SILOSOL RED RHNIRGALITE RED FBSIRGALITE RED FBXSCARLET 2SCONFAST RED 2RPIGMENT RED 2RKROMON RED 2RPERMANENT RED FRR
Properties
Computed structural properties
- XLogP
- 7.2
- Topological polar surface area
- 74.1 Ų
- Hydrogen bond donors
- 2
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 4
- Heavy atoms
- 30
- Formal charge
- 0
- Complexity
- 613
Experimental & physicochemical properties
Chemical ClassesDye
Polymers
Plastics -> Pigments agents
Plastics -> Polyolefin-I; PUR; Polyolefin-II; PVC (soft); ABS; PVC (rigid); PET; PMMA; PA; PC; (E)PS
Solubilityless than 1 mg/mL at 66 °F (NTP, 1992)
Melting Point590 to 592 °F (NTP, 1992)
Physical Description
Yellowish red solid with a tint of pink or dark red powder. (NTP, 1992)
Other Solid; Wet Solid; Dry Powder; CBI; Liquid
Physicochemical properties
- Melting point
- 310 · 310-311°C
- Boiling point
- 595.2 · 595.2±50.0 °C(Predicted)
- Density
- 1.38 · 1.38±0.1 g/cm3(Predicted)
- vapor pressure
- 0 Pa · 0Pa at 25℃
- solubility
- 8.63 mg/L · 8.63mg/L in organic solvents at 20 ℃
Safety & regulation
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 99.7% (334 of 335) of all reports.
Not Classified
Aggregated GHS information provided per 335 reports by companies from 4 notifications to the ECHA C&L Inventory.
Hazard information
Regulatory Information
Chemical: 2-Naphthalenecarboxamide, 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenyl-
2-Naphthalenecarboxamide, 4-[2-(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 2-Naphthalenecarboxamide, 4-[2-(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
REACH registered substance: 4-[(2,5-dichlorophenyl)azo]-3-hydroxy-N-phenylnaphthalene-2-carboxamide (EC: 227-930-1)
2-Naphthalenecarboxamide, 4-(2,5-dichlorophenyl)azo-3-hydroxy-N-phenyl-: Does not have an individual approval but may be used under an appropriate group standard
Fire HazardsFlash point data for this chemical are not available, however it is probably combustible. (NTP, 1992)
Reactive GroupAmides and Imides
Reactivity AlertsExplosive
Reactivity Profile
PIGMENT RED 2 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Chemistry & industry
Uses & manufacturing
Uses
Plastics -> Typical concentration range in plastic materials -> 2%
Substance listed with specific concentration in tattoo ink and/or permanent make up according to EU Commission Regulation 2020/2081. The concentration limit (by weight) is 0.1%.
U.S. Production2023: 250,000 - <400,000 lb
Consumer UsesPigment
Industry UsesPigment
Use Classification
Plastics -> Polymer Type -> Polyolefin-I; PUR; Polyolefin-II; PVC (soft); ABS; PVC (rigid); PET; PMMA; PA; PC; (E)PS
Plastics -> Pigments agents
General Manufacturing Information
Synthetic Dye and Pigment Manufacturing
2-Naphthalenecarboxamide, 4-[2-(2,5-dichlorophenyl)diazenyl]-3-hydroxy-N-phenyl-: ACTIVE
Applications
General DescriptionYellowish red solid with a tint of pink or dark red powder.
Suppliers36 total
湖北万得化工有限公司15377098680 15377098680 · [email protected]
郑州汇聚化工有限公司0371-53399770 18037166334 · [email protected]
广州纳珑化工有限公司13192879270; 13192879270 · [email protected]
上海麦克林生化科技股份有限公司021-50706066 15221275939 · [email protected]
Related reactions
0 records
No reaction records under the current filter.
Compound notes
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