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2051-85-6

Basic Information
CAS No.: 2051-85-6
Name: 1,3-Benzenediol,4-(2-phenyldiazenyl)-
Article Data: 31
Cas Database
Molecular Structure:
Molecular Structure of 2051-85-6 (1,3-Benzenediol,4-(2-phenyldiazenyl)-)
Formula: C12H10 N2 O2
Molecular Weight: 214.224
Synonyms: 1,3-Benzenediol,4-(phenylazo)- (9CI); C.I. Solvent Orange 1 (7CI,8CI); Sudan G (6CI); 1504Yellow; 2,4-Dibenzeneazoresorcinol; 2,4-Dihydroxyazobenzene;4-(Phenylazo)resorcinol; Benzeneazoresorcinol; C.I. 11920; C.I. Food Orange 3;Ceres Orange; Ceres Orange G; Ceres orange GN; Cerisol Yellow GR; Fast OilOrange T; Fast Oil Yellow 2G; Fast Oil Yellow G; Fat Orange A; Fat Orange G;Fat Orange GS; Fat Orange RG; Fat Victoria Yellow D; Grasol Yellow RSF; HexacolOil Yellow GG; Lacquer Orange V 3G; NSC 7949; Oil Orange 4G; Oil Orange G; OilOrange MO; Oil Orange MON; Oil Orange MON Extra; Oil Yellow G Extra; Oil YellowGG; Oil-sol. Yellow Zh; Orange Au Gras W 2201; Organol Orange 2J; PlastoresinOrange F 3A; Resinol Orange G; Solvent Orange 1; Sudan Orange G; Sudan YellowAR; Tertrogras Orange SG; Yellow M Soluble in Grease
EINECS: N/A
Density: 1.24g/cm3
Melting Point: 143-146oC
Boiling Point: 407.501oC at 760 mmHg
Flash Point: 262.509oC
Solubility: 0.2g/L(20 oC)
Appearance: N/A
Hazard Symbols: Xn
Risk Codes: R22;
Safety: Moderately toxic by intraperitoneal route. When heated to decomposition it emits toxic vapors of NOx.
Transport Information: N/A
PSA: 65.18000
LogP: 3.51320
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Chemistry

Chemistry informtion about C.I. Food Orange 3 (CAS NO.2051-85-6) is:
IUPAC Name: (4z)-3-Hydroxy-4-(Phenylhydrazinylidene)Cyclohexa-2,5-Dien-1-One
Synonyms: P-Phenylazoresorcinol ; Sog ; Solvent Orange 1 ; Sudan Orange G ; Sudan G ; 1,3-Benzenediol, 4-(Phenylazo)- ; 1504 Yellow ; 1504yellow
Product Categories: Organics
MF: C12H10N2O2
MW: 214.22
EINECS: 218-131-9 
Density: 1.24 g/cm3 
Melting Point: 143-146 °C(lit.)
Flash Point: 178.1 °C
Boiling Point: 370.9 °C at 760 mmHg
Vapour Pressure: 3.7E-06 mmHg at 25°C
Enthalpy of Vaporization: 65.19 kJ/mol
Following is the molecular structure of C.I. Food Orange 3 (CAS NO.2051-85-6) is:

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 intraperitoneal 600mg/kg (600mg/kg)   "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1307, 1986.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Moderately toxic by intraperitoneal route. When heated to decomposition it emits toxic vapors of NOx
Hazard Codes:
IrritantXi
Risk Statements:
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements:
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
WGK Germany: 3
RTECS: CZ9027500

Specification

 C.I. Food Orange 3 (CAS NO.2051-85-6) is a red-orange powder.
First Aid Measures:
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion: Get medical aid. Wash mouth out with water.
Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician: Treat symptomatically and supportively. 
Handling and Storage:
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Storage: Store in a cool, dry place. Store in a tightly closed container.