Para Red supplier | CasNO.6410-10-2

Name
1-(4-NITROPHENYLAZO)-2-NAPHTHOL
EINECS 229-093-8
CAS No. 6410-10-2
Article Data68
CAS DataBase
Density 1.35g/cm³
Solubility

Stability

Stable. Incompatible with strong oxidizing agents.

Toxicology

Skin, eye and respiratory irritant.

Toxicity data
(The meaning of any toxicological abbr

Melting Point 248-252 °C
Formula C16H11 N3 O3
Boiling Point 489.5°C at 760 mmHg
Molecular Weight 293.282
Flash Point 249.8°C
Transport Information
Appearance solid
Safety 680469
Risk Codes 36/37/38
Molecular Structure
Hazard Symbols Xi
Synonyms 2-Naphthalenol,1-[(4-nitrophenyl)azo]- (9CI); 2-Naphthol, 1-(p-nitrophenylazo)- (6CI); C.I.Pigment Red 1 (7CI,8CI); 1-(2-Hydroxynaphthyl)-4'-nitroazobenzene;1-[(4-Nitrophenyl)azo]-2-naphthol; 1-[(p-Nitrophenyl)azo]-2-naphthol; C.I.12070; C.P. Britelite Toner RP 9; C.P. Para Toner Light RP 2; Carnelio Para RedBS; Carnelio Para Red YS; Conc. Para Red; Conc. Para Red YS; Dainichi Para RedToner; Duplex Para Red XD 20-2900; Eljon Para Red; Federal Red; Isol Para RedB; Kromon Para Red BS; Kromon Para Red YS; Label Red; Lacal Red GN; Lake Red2R; Lake Red PN; Lutetia Red B; Lutetia Red N; Monolite Fast Red B; MonoliteFast Red BA; NSC 210792; NSC 70812; No. 7 Conc. Deep Red; Para Nitraniline Red;Para Red; Para Red B 20-2080; Para Red BS; Para Red Dark; Para Red Dark RA1280; Para Red Light; Para Red Light 10333; Para Red Light RA 1210; Para RedToner; Para Red Toner RPT 52; Para Red YS; Para Toner; Para Toner B; Para TonerD; Para Toner Dark 5065; Para Toner Deep A 1757; Para Toner Light A 4329; ParaToner Light RT 370; Para Toner Red; Para Toner Y 20-1150; Pigment Red 1;Pigment Red B; Pigment Red G; Pigment Red R; Pigment Red Zh; Recolite Para RedB; Recolite Para Red G; Sanyo Signal Red Pure; Siloton Red B; Siloton Red G;Symuler Fast Para Red; Tertropigment Red PAB; Tolyl Red D; Tolyl Red LL; TolylRed M; p-Nitraniline red
PSA 90.77000
LogP 5.39220

Synthetic route

: 100-01-6
4-nitro-aniline

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With potassium hydrogensulfate; water; sodium nitrite for 0.0333333h; Diazotization; coupling; microwave irradiation;	100%
With hydrogenchloride; sodium nitrite In water at 20℃; for 1h; Time;	99%
With hydrogenchloride; sodium nitrite In water at 20℃; for 0.0833333h; Reagent/catalyst; Temperature; Green chemistry;	99%

: 875-83-2
sodium 2-naphtholate

: 100-01-6
4-nitro-aniline

: 6410-10-2
para red

Conditions

Conditions	Yield
With sodium nitrite In water at 0 - 5℃; for 0.25h;	95%

: 93680-31-0
C7H6N8O2

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With trifluoroacetic acid In benzene at 65℃; for 3h;	94%

: 135-19-3
β-naphthol

: 4-nitrobenzenediazonium o-benzenedisulfonimide

: 6410-10-2
para red

Conditions

Conditions	Yield
With sodium hydroxide In water for 0.333333h;	94%
With toluene-4-sulfonic acid In methanol at 20℃; Kinetics; Further Variations:; Reagents;

: 100-05-0
4-nitrobenzenediazonium chloride

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With sodium hydroxide In water for 0.383333h;	92%
With sodium selenite In sodium hydroxide
azo coupling;

: 135-19-3
β-naphthol

: 3-Hydroxy-1-(p-nitrophenyl)-3-(o-nitrosophenyl)triazene

: 6410-10-2
para red

Conditions

Conditions	Yield
Stage #1: 3-Hydroxy-1-(p-nitrophenyl)-3-(o-nitrosophenyl)triazene With hydrogenchloride; water; acetic acid at 10℃; for 0.166667h; Stage #2: β-naphthol With sodium hydroxide In water	90%

: 100-01-6
4-nitro-aniline

: 135-19-3
β-naphthol

A: 6410-10-2
para red

B: 57376-58-6
2-naphthoquinone 1-(4'-nitrophenyl)hydrazone

Conditions

Conditions	Yield
Stage #1: 4-nitro-aniline With hydrogenchloride In water at 0 - 5℃; for 0.0833333h; Stage #2: With 1-(4-(nitrosooxy)butyl)-3-methylimidazolium chloride In water at 0 - 5℃; for 0.416667h; Stage #3: β-naphthol With sodium hydroxide In water at 0℃; for 0.366667h;	A 89% B n/a

...Expand

: 91363-26-7
p-nitrophenylazobenzenethiosulfonate

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With hydrogenchloride; sodium hydroxide at 50 - 60℃; for 3h;	88.2%

: 573-97-7
1-bromo-2-naphthol

: 4-nitrobenzenediazonium o-benzenedisulfonimide

A: 586-78-7
para-nitrophenyl bromide

B: 6410-10-2
para red

Conditions

Conditions	Yield
With sodium hydroxide; tetraethylammonium bromide In acetonitrile at 20℃; for 10h; Product distribution; Further Variations:; Reagents; Reaction partners;	A 80% B 15%

...Expand

: 56049-47-9
N'-tosyl-4-nitrophenylhydrazine

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With potassium carbonate In dichloromethane at 20℃; for 8h;	78%

: 100-25-4
para-dinitrobenzene

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
Stage #1: para-dinitrobenzene With perchloric acid; sulfuric acid; sodium nitrite In water; ethyl acetate Electrochemical reaction; Stage #2: β-naphthol In water Alkaline conditions;	65%

: 14368-49-1
p-nitrobenzenediazonium

: 633-99-8
1-chloro-2-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With alkali

: 14368-49-1
p-nitrobenzenediazonium

: 573-97-7
1-bromo-2-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With alkali

: 14368-49-1
p-nitrobenzenediazonium

: 2033-42-3
1-iodo-2-hydroxynaphthalene

: 6410-10-2
para red

Conditions

Conditions	Yield
With alkali

: 100-05-0
4-nitrobenzenediazonium chloride

: 875-83-2
sodium 2-naphtholate

: 6410-10-2
para red

: 1-phenylazo-[2]naphthol; dinitrate

A: 606-79-1
1,6-dinitro-2-naphthol

B: benzenediazonium nitrate

C: 6410-10-2
para red

Conditions

Conditions	Yield
beim Aufbewahren;

...Expand

: 842-07-9
Sudan I

: 6410-10-2
para red

Conditions

Conditions	Yield
With sulfuric acid; nitric acid
With nitric acid

: 108953-69-1
3-ethyl-1-(4-nitro-phenyl)-3-phenyl-triazene

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With acetic acid

: 53464-31-6
1-(4-nitrophenyl)-3,3'-methylphenyltriazene

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With acetic acid

: 32352-96-8
(E)-4-nitro-benzenediazo hydroxide; sodium-salt

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With ethanol

: 135-19-3
β-naphthol

: 40078-29-3
4-nitro-benzenediazo hydroxide

: 6410-10-2
para red

Conditions

Conditions	Yield
With benzene

: 64-17-5
ethanol

: 135-19-3
β-naphthol

: 58468-75-0
(4-nitro-phenyl)-cis-diazenecarbonitrile

: 6410-10-2
para red

...Expand

: 135-19-3
β-naphthol

: 58468-75-0
(4-nitro-phenyl)-cis-diazenecarbonitrile

: 6410-10-2
para red

Conditions

Conditions	Yield
With ethanol

: 3025-77-2
1-(4'-nitrobenzeneazo)-2-amino-naphthalene

: 6410-10-2
para red

Conditions

Conditions	Yield
With acetic acid; sodium nitrite Kochen des Reaktionsprodukts mit alkoh.Kali;

: 14368-49-1
p-nitrobenzenediazonium

: 573-89-7
orange II

: 6410-10-2
para red

Conditions

Conditions	Yield
in alkal. Loesung;

: 86488-78-0
C13H9N5O6

: 135-19-3
β-naphthol

: 6410-10-2
para red

Conditions

Conditions	Yield
With sodium hydroxide In ethanol for 0.0833333h; Ambient temperature;	64 % Spectr.

: 135-19-3
β-naphthol

: 21857-39-6
p-nitrobenzenediazo methyl ether

: 6410-10-2
para red

Conditions

Conditions	Yield
hydrogenchloride In 1,4-dioxane at 25℃; Rate constant; Mechanism; in different solvent and HCl concentration;

: 14368-49-1
p-nitrobenzenediazonium

-<4 azo 4>-naphthol-(2): -<4 azo 4>-naphthol-(2)

: 6410-10-2
para red

Conditions

Conditions	Yield
With alkali

: 842-07-9
Sudan I

HNO3+H2SO4: HNO3+H2SO4

: 6410-10-2
para red

: 6410-10-2
para red

: 84317-57-7
(2-Chloro-naphthalen-1-yl)-(4-nitro-phenyl)-diazene

Conditions

Conditions	Yield
With trichlorophosphate In N,N-dimethyl-formamide for 2h; Heating;	95%

: 6410-10-2
para red

: 2653-68-1, 100893-99-0, 138710-34-6
1-(4-aminophenylazo)naphthalen-2-ol

Conditions

Conditions	Yield
With sodium sulfide; sodium hydroxide In water at 75 - 80℃; pH=9 - 10;	92%
With sodium sulfide
With ethanol; sodium hydrogensulfite
With ammonium sulfide

: 109-63-7
boron trifluoride diethyl etherate

: 6410-10-2
para red

: 1-((4-nitrophenyl)azo)-2-naphthalate difluoroborate

Conditions

Conditions	Yield
With acetic acid for 48h; Inert atmosphere; Reflux;	80%

: 6410-10-2
para red

: 57376-58-6
2-naphthoquinone 1-(4'-nitrophenyl)hydrazone

Conditions

Conditions	Yield
In ethanol Product distribution; contents of the hydrazone form in equilibrium = 81 percent;

Para Red Chemical Properties

Molecular Structure of Para Red (CAS NO.6410-10-2):

IUPAC Name: (1E)-1-[(4-Nitrophenyl)hydrazinylidene]naphthalen-2-one
Molecular Formula: C₁₆H₁₁N₃O₃
Molecular Weight: 293.28
EINECS: 229-093-8
Melting Point: 248-252 °C
Index of Refraction: 1.673
Molar Refractivity: 81.25 cm³
Molar Volume: 216.7 cm³
Surface Tension: 58.1 dyne/cm
Density: 1.35 g/cm³
Flash Point: 277.5 °C
Enthalpy of Vaporization: 84.21 kJ/mol
Boiling Point: 535.2 °C at 760 mmHg
Vapour Pressure: 4.53E-12 mmHg at 25 °C
Classification Code: Mutation data
Appearance: Red solid

Para Red Production

Para Red is prepared by diazotisation of para-nitroaniline at ice-cold temperatures.

Para Red Safety Profile

Safety Information of Para Red (CAS NO.6410-10-2):
Hazard Codes: Irritant Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 24/25-36-26
S24/25:Avoid contact with skin and eyes.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36:Wear suitable protective clothing.
RTECS: QL4510000

Para Red Specification

Para Red (CAS NO.6410-10-2), its Synonyms are 1-((4-Nitrobenzene)azo)-2-naphthol ; 1-((4-Nitrophenyl)azo)-2-naphthol ; 1-((p-Nitrophenyl)azo)-2-naphthol ; 2-Naphthalenol, 1-((4-nitrophenyl)azo)- ; C.I. Pigment Red 2 ; C.P. Britelite Toner RP-9 ; C.P. Para Toner Light RP-2 ; Carnelio Para Red BS ; Carnelio Para Red YS ; Conc. Para Red ; Conc. Para Red YS ; Dainichi Para Red Toner .
Para Red is a chemical dye. Chemically, the dye is similar to Sudan I. The dye was discovered in 1880 by von Gallois and Ullrich, and was the first azo dye. It dyes cellulose fabrics a brilliant red, but is not very fast. The dye can be washed away easily from cellulose fabrics if not dyed correctly. Throughout making Para Red, the solution will become acidic and basic. Small amounts of byproducts may be left over after the Para Red dye is made that may be acidic or basic, but if made correctly there are little of these and the byproducts have no effect.

Product Name

1-(4-NITROPHENYLAZO)-2-NAPHTHOL

Stability

Toxicology

Synthetic route

Para Red Chemical Properties

Para Red Production

Para Red Safety Profile

Para Red Specification

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