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Para Red

HCID 22917
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Basic informationOverviewNames & identifiersPropertiesSafety & regulationChemistry & industryRelated reactionsCompound notes
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Basic information

CAS
6410-10-2
Standard SMILES
O=[N+]([O-])c1ccc(N=Nc2c(O)ccc3ccccc23)cc1
InChIKey
WOTPFVNWMLFMFW-UHFFFAOYSA-N
Molecular formula
C16H11N3O3
Average molar mass
293.28 g/mol
Monoisotopic mass
293.08004122

Overview

See also: Pigment Red 1 (annotation moved to).

Names & identifiers

Preferred name
Para Red
IUPAC
1-[(4-nitrophenyl)diazenyl]naphthalen-2-ol
English name
1-(4-Nitrophenylazo)-2-naphthol
Molecular formula
C16H11N3O3
Molecular weight
293.28

Names & synonyms

Para Red6410-10-21-(4-Nitrophenylazo)-2-naphtholLutetia Red N1-((4-Nitrophenyl)diazenyl)naphthalen-2-olPara TonerPara Red Tonerp-Nitraniline redPara Toner DCarnelio Para Red BSFederal RedPara Nitraniline Red
Show more names
PIGMENT RED 1Para ReC.I.12070PararotCIPIGMENTRED1Para Red, pure100 μg/mL in THF
Para Red Toner RPT-52Label RedCarnelio Para Red YSEljon Para RedPara Red LightPara Toner RedLutetia Red BPara Red Dark

Database identifiers

CAS
6410-10-2
PubChem CID
22917
DTXSID
DTXSID1052325
ChEMBL
CHEMBL1967257
UNII
D54Q24K2EI
Nikkaji
J3.321.018C、J33.578I、J993.382D

Properties

Computed structural properties

XLogP
4
Topological polar surface area
90.8 Ų
Hydrogen bond donors
1
Hydrogen bond acceptors
5
Rotatable bonds
2
Heavy atoms
22
Formal charge
0
Complexity
415

Physicochemical properties

Melting point
248 · 248-252 °C
Boiling point
435.13 °C · 435.13°C (rough estimate)
Density
1.2211 · 1.2211 (rough estimate)
refractive index
1.65 · 1.6500 (estimate)
storage temp.
Sealed in dry,Room Temperature
solubility
DMSO (Slightly, Heated)
pka
13.45 · 13.45±0.50(Predicted)
Colour Index
12070 · 12070
form
solid
color
Red
λmax
488 nm · 488 nm
BRN
680469 · 680469
Stability
Stable. Incompatible with strong oxidizing agents.
Major Application
cleaning productscosmeticsfood and beveragespersonal care
InChI
1S/C16H11N3O3/c20-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)19(21)22/h1-10,20H
InChIKey

Safety & regulation

Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.

Safety data

PPE
dust mask type N95 (US), Eyeshields, Gloves
wgk
3
tsca
TSCA listed
rtecs
QL4510000
hs_code
29270000
risk_code
36/37/38
Signal word
Warning
Symbol(GHS)
GHS07
hazard_code
Xi
safety_code
24/25-36-26-36/37/39
Storage Class
11 - Combustible Solids
target organs
Respiratory system
Hazard statements
H315-H319-H335
Hazard Classifications
Eye Irrit. 2Skin Irrit. 2STOT SE 3
Precautionary statements
P261-P264-P271-P280-P302+P352-P305+P351+P338

Chemistry & industry

Applications

UsesPara Red is used as a fat soluble chemical dye and food additive. It is a banned colorant and a number of analytical techniques have been developed to detect it in food.

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Compound notes

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On this pageBasic informationOverviewNames & identifiersPropertiesSafety & regulationChemistry & industryRelated reactionsCompound notes
WOTPFVNWMLFMFW-UHFFFAOYSA-N
SMILES
Oc1ccc2ccccc2c1N=Nc3ccc(cc3)[N+]([O-])=O
CAS DataBase Reference
6410 · 6410-10-2(CAS DataBase Reference)
FDA UNII
54 Q24K2EI · D54Q24K2EI
EPA Substance Registry System
1 · C.I. Pigment Red 1 (6410-10-2)
UNSPSC Code
85151701 · 85151701
NACRES
47 · NA.47
Symbol(GHS)
7 · GHS07
Signal word
Warning
Hazard statements
315 · H315-H319-H335
Precautionary statements
261 · P261-P264-P271-P280-P302+P352-P305+P351+P338
target organs
Respiratory system
PPE
95 · dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes
Xi
Risk Statements
36 · 36/37/38
Safety Statements
24 · 24/25-36-26-36/37/39
WGK Germany
3 · 3
RTECS
4510000 · QL4510000
TSCA
TSCA listed
HS Code
29270000 · 29270000
Storage Class
11 · 11 - Combustible Solids
Hazard Classifications
2 Skin · Eye Irrit. 2Skin Irrit. 2STOT SE 3