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Name	Pigment red 4	EINECS	220-562-2
CAS No.	2814-77-9	Density	1.45 g/cm³
PSA	90.77000	LogP	6.04560
Solubility	N/A	Melting Point	276oC
Formula	C₁₆H₁₀ClN₃O₃	Boiling Point	558.9 °C at 760 mmHg
Molecular Weight	327.727	Flash Point	291.8 °C
Transport Information	N/A	Appearance	salmon pink powder
Safety	26	Risk Codes	36
Molecular Structure		Hazard Symbols	Xi
Synonyms	2-Naphthalenol,1-[(2-chloro-4-nitrophenyl)azo]- (9CI);2-Naphthol,1-(2-chloro-4-nitrophenylazo)- (6CI);C.I. Pigment Red 4 (7CI,8CI);1-(2-Chloro-4-nitrophenylazo)-2-naphthol;1-(o-Chloro-p-nitrophenylazo)-2-naphthol;ADC Permanent Red Toner R;American Vermilion;C-Red 1;C.I. 12085;Carnelio Red R;Chlorparanitraniline Red;D and C Red No. 36;C Red No. 36;Dainichi Permanent Red RX;Duplex Permaton Red L 20-7022;Fast Orange 3R;Fast Orange 3RJ;Fastona Red R;Fire Red Toner;Flame Tones;Glo-blaze Red R 152;Irgalite Red PRR;Isol Fast Red R;Isol Fast Red RG;Kromon RedR;Latexol Red J;Lutetia Fast Orange 3R;Monolite Fast RedG;Monolite Fast Red GF;No. 1 Forthfast Red R;Permanent Red BFR;Permanent Red R;Permanent Red R Extra;Permanent Red Toner R;Permaton Red;Pigment Scarlet Zh;Pyrotone Red Toner RA 5520;Red Extract R;Red No. 228;Rubber Red R Extra;Segnale Light Red PRG;Silopol Red G;Siloton Red 2G;SytonFast Red R;Tanager Red X 761;Vulcafor Orange R;	Article Data	8

Pigment red 4 Consensus Reports

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Pigment red 4 Specification

The 1-((2-Chloro-4-nitrophenyl)azo)-2-naphthol, with the CAS registry number 2814-77-9 and EINECS registry number 220-562-2, has the IUPAC name and systematic name of 1-[(E)-(2-chloro-4-nitrophenyl)diazenyl]naphthalen-2-ol. It is a kind of salmon pink powder, and belongs to the following product categories: Dyes and Pigments; Organics. And the molecular formula of the chemical is C₁₆H₁₀ClN₃O₃. What's more, it is always used for the pigmentation of ink, watercolor or oil paints. It may cause dermatitis, hence, while dealing with it, you should be cautious.

The physical properties of 1-((2-Chloro-4-nitrophenyl)azo)-2-naphthol are as followings: (1)ACD/LogP: 5.25; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.25; (4)ACD/LogD (pH 7.4): 5.25; (5)ACD/BCF (pH 5.5): 5772.9; (6)ACD/BCF (pH 7.4): 5772.89; (7)ACD/KOC (pH 5.5): 17139.49; (8)ACD/KOC (pH 7.4): 17139.47; (9)#H bond acceptors: 6; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 4; (12)Polar Surface Area: 90.77 Å²; (13)Index of Refraction: 1.684; (14)Molar Refractivity: 85.85 cm³; (15)Molar Volume: 226 cm³; (16)Polarizability: 34.03×10^-24cm³; (17)Surface Tension: 59.3 dyne/cm; (18)Density: 1.45 g/cm³; (19)Flash Point: 291.8 °C; (20)Enthalpy of Vaporization: 87.24 kJ/mol; (21)Boiling Point: 558.9 °C at 760 mmHg; (22)Vapour Pressure: 4.25E-13 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: Clc3cc(ccc3/N=N/c1c2ccccc2ccc1O)N(=O)=O
(2)InChI: InChI=1/C16H10ClN3O3/c17-13-9-11(20(22)23)6-7-14(13)18-19-16-12-4-2-1-3-10(12)5-8-15(16)21/h1-9,21H/b19-18+
(3)InChIKey: XLTMWFMRJZDFFD-VHEBQXMUBX

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