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Chemical Database: 2-Naphthalenol, 1-((4-methyl-2-nitrophenyl)azo)- (

Chemical Database

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2-Naphthalenol, 1-((4-methyl-2-nitrophenyl) azo)-


  • CAS Number: 12238-48-1
  • CAS Number: 12240-01-6
  • CAS Number: 12240-02-7
  • CAS Number: 2425-85-6
  • CAS Number: 39310-30-0
  • Synonyms/Related:
    • ((4-Methyl-2-nitrophenyl) azo)-2-naphthol
    • 1-((2-Nitro-4-methylphenyl) azo)-2-naphthol
    • 1-((4-(Phenylazo) phenyl) azo)-2-naphthalenol
    • 1-((4-Methyl-2-nitrophenyl) azo)-2-naphthalenol
    • 1-((p-Phenylazo) phenyl) azo-2-naphthol
    • 1-(4-(Phenylazo) phenylazo)-2-naphthol
    • 1-(4-Methyl-2-nitrophenylazo)-2-naphthol
    • 1-(o-Nitro-p-tolylazo)-2-naphthol
    • 1-(Phenylazophenylazo)-2-hydroxynaphthalene
    • 1-[[4-(Phenylazo) phenyl]azo]-2-naphthalenol
    • 1-[[p-(Phenylazo) phenyl]azo]-2-naphthol
    • 111440 Red
    • 2-Naphthalenol, 1-((4-methyl-2-nitrophenyl) azo)-
    • 2-Naphthalenol, 1-[ (4-methyl-2-nitrophenyl) azo]-
    • 2-Naphthalenol, 1-[(4-methyl-2-nitrophenyl) azo]-
    • 2-Naphthalenol, 1-[[4- (phenylazo) phenyl]azo]-
    • 2-Naphthalenol, 1-[[4-(phenylazo) phenyl]azo]-
    • 2-Naphthol, 1-((p-(phenylazo) phenyl) azo)-
    • 2-Naphthol, 1-[[p-(phenylazo) phenyl]azo]-
    • Accosperse toluidine red XL
    • Adc Toluidine Red B
    • Atlasol Spirit Red 3
    • Atul Oil Red G
    • Basoflex Red 361
    • Benzeneazobenzeneazo-.beta.-naphthol
    • Benzeneazobenzeneazo-beta-naphthol
    • Brasilazina Oil Scarlet
    • C.I.12120
    • C.I.pigment Red 3
    • C.P. Toluidine Toner A-2989
    • C.P. Toluidine Toner A-2990
    • C.P. Toluidine Toner Dark RS-3340
    • C.P. Toluidine Toner Deep X-1865
    • C.P. Toluidine Toner Light RS-3140
    • C.P. Toluidine Toner RT-6101
    • C.P. Toluidine Toner RT-6104
    • C.P.Toluidine Toner A-2989
    • C.P.Toluidine Toner A-2990
    • C.P.Toluidine Toner Dark RS-3340
    • C.P.Toluidine Toner Deep X-1865
    • C.P.Toluidine Toner Light RS-3140
    • C.P.Toluidine Toner RT-6101
    • C.P.Toluidine Toner RT-6104
    • Calcotone Toluidine Red YP
    • Carnelio Helio Red
    • Cerasin Red
    • Cerasinrot
    • Cerotinscharlach R
    • Certiqual Oil Red
    • Cerven pigment 3
    • Cerven pigment 3 [Czech]
    • Cerven rozpoustedlova 23 [Czech]
    • Chromatex red J
    • CI 12120
    • CI 26100
    • CP Toluidine toner A-2989
    • D & C Red no. 17
    • D AND C RED NO 35
    • D and C Red No. 17
    • D and C Red No. 35
    • Dainichi permanent red 4 R
    • Deep fastona red
    • Duplex Toluidine Red L 20-3140
    • Eljon fast scarlet PV extra
    • Eljon Fast Scarlet RN
    • Enialit Light Red RL
    • Fast Oil Scarlet III
    • Fast Red A
    • Fast Red A (pigment)
    • Fast Red A (VAN)
    • Fast Red AB
    • Fast Red J
    • Fast Red JE
    • Fast Red R
    • Fastona Red B
    • Fastona Scarlet RL
    • Fastona Scarlet YS
    • Fat Red (bluish)
    • Fat Red G
    • Fat Red HRR
    • Fat Red R
    • Fat Red RS
    • Fat Red RS (VAN)
    • Fat Red, Bluish
    • Fat Red, Bluish (VAN)
    • Fat Scarlet LB
    • Fat Soluble Red ZH
    • FD and C Red No. 17
    • Fettponceau G
    • Fettrot
    • Fettscharlach
    • Fettscharlach LB
    • Graphtol Red A-4RL
    • Grasal Brilliant Red G
    • Grasan Brilliant Red G
    • Hansa Red B
    • Hansa Red G
    • Hansa Scarlet RB
    • Hansa Scarlet RN
    • Hansa Scarlet RNC
    • Helio fast red BN
    • Helio fast red RL
    • Helio Fast Red RN
    • Helio Red RL
    • Helio Red Toner
    • Hispalit fast scarlet rn
    • Independence red
    • Irgalite Fast Red P4R
    • Irgalite Fast Scarlet RND
    • Irgalite Red PV2
    • Irgalite Red RNPX
    • Irgalite Scarlet RB
    • Isol Fast Red HB
    • Isol Fast Red RN2B
    • Isol Fast Red RN2G
    • Isol Fast Red RNB
    • Isol Fast Red RNG
    • Isol Toluidine Red HB
    • Isol Toluidine Red RN2B
    • Isol Toluidine Red RN2G
    • Isol Toluidine Red RNB
    • Isol Toluidine Red RNG
    • Japan Red 225
    • Kromon helio fast red
    • Kromon Helio Fast Red YS
    • Lake Red 4R
    • Lake Red 4RII
    • Lithol Fast Scarlet RN
    • Lutetia Fast Red 3R
    • Lutetia Fast Scarlet RF
    • Lutetia Fast Scarlet RJN
    • Monolite fast scarlet CA
    • Monolite Fast Scarlet GSA
    • Monolite Fast Scarlet RB
    • Monolite Fast Scarlet RBA
    • Monolite Fast Scarlet RN
    • Monolite Fast Scarlet RNA
    • Monolite Fast Scarlet RNV
    • Monolite Fast Scarlet RT
    • Motirot 2R
    • NO 2 Forthfast scarlet
    • No. 2 Forthfast Scarlet
    • Oil Red
    • Oil Red 3B
    • Oil Red 3G
    • Oil Red 6566
    • Oil Red AS
    • Oil Red B
    • Oil Red G
    • Oil Scarlet AS
    • Oil Scarlet G
    • Oralith red P4R
    • Organol Red BS
    • Organol Scarlet
    • Permanent Red 4R
    • Pigment Red 3
    • Pigment Red RL
    • Pigment Ruby
    • Pigment Scarlet
    • Pigment scarlet (RUSSIAN)
    • Pigment Scarlet B
    • Pigment Scarlet N
    • Pigment scarlet r
    • Pigment Scarlet [Russian]
    • Polymo red fgn
    • Ponceau, insoluble, OLG
    • Pyronalrot B
    • Recolite fast red bl
    • Recolite fast red rbl
    • Recolite Fast Red RL
    • Recolite Fast Red RYL
    • Red No. 225
    • Red ZH
    • Rot C
    • Rot G
    • Rouge cerasine
    • Sanyo Scarlet Pure
    • Sanyo Scarlet Pure No. 1000
    • Scarlet B Fat Soluble
    • Scarlet B, fat soluble
    • Scarlet pigment RN
    • Schultz No. 31
    • Segnale Light Red 2B
    • Segnale Light Red B
    • Segnale Light Red BR
    • Segnale Light Red C4R
    • Segnale Light Red RL
    • Siegle Red 1
    • Siegle Red B
    • Siegle Red BB
    • Silogomma Red RLL
    • Silosol Red RBN
    • Silosol Red RN
    • Siloton Red BRLL
    • Siloton Red RLL
    • Silotras Scarlet TB
    • Solvent red 23
    • Somalia Red III
    • Soudan III
    • Stearix Scarlet
    • Sudan 3
    • Sudan G
    • Sudan G III
    • Sudan III
    • Sudan III (G)
    • Sudan III, G
    • Sudan P III
    • Sudan Red III
    • Symuler Fast Scarlet 4R
    • Syton fast scarlet rb
    • Syton fast scarlet rd
    • Syton fast scarlet rn
    • Tertropigment red hab
    • Tertropigment scarlet lrn
    • Tetrazobenzene-.beta.-naphthol
    • Tetrazobenzene-beta-naphthol
    • Toluidine red
    • Toluidine red 10451
    • Toluidine Red 3B
    • Toluidine Red 4R
    • Toluidine Red BFB
    • Toluidine Red BFGG
    • Toluidine Red D 28-3930
    • Toluidine Red Light
    • Toluidine Red M 20-3785
    • Toluidine Red R
    • Toluidine Red RT-115
    • Toluidine Red Toner
    • Toluidine Red XL 20-3050
    • Toluidine Toner
    • Toluidine Toner 4R X-2700
    • Toluidine Toner Dark 5040
    • Toluidine Toner HR X-2700
    • Toluidine Toner HR X-2741
    • Toluidine Toner Keep HR X-2742
    • Toluidine Toner L 20-3300
    • Toluidine Toner L20-3300
    • Toluidine Toner RT-252
    • Toney Red
    • Tony Red
    • Versal scarlet prnl
    • Versal scarlet rnl
    • Vulcafor scarlet a
    • [(4-Methyl-2-nitrophenyl) azo]-2-naphthol

Health & Regulatory Guidelines

  • EPA Regulations:
    • Marine Polutant: No
  • OSHA Regulations:

Related Resources

  • USDOT Hazardous Materials Table 49 CFR 172.101
    An online version of the USDOT's listing of hazardous materials from 49CFR 172.101. This table can be sorted by proper shipping name, UN/NA ID and/or by primary hazard class/division.
  • 2008 ERG (Emergency Response Guidebook)
    Have you ever wondered what those four digit numbers on the placards on the side of trucks and rail cars mean? Our online 2008 ERG will give you your answer. This is an online version of the guidebook produced by the USDOT for first responders during the initial phase of a Dangerous goods/HazMat incident. ERG data last verified/updated Oct. 2, 2011
  • US DOT Hazardous Materials Transportation Placards
    Hazardous materials placards (DOT placards) are required when shipping hazardous materials in the United States, Canada and Mexico. These pages provide US DOT definitions for each hazmat placard.
  • Guide for Handling Household Chemicals
    Things you can do to make your home safer.
  • Molarity, Molality and Normality
    Introduces stoichiometry and explains the differences between molarity, molality and normality.
  • Molar Mass Calculations and Javascript Calculator
    Molar mass calculations are explained and there is a JavaScript calculator to aid calculations.
  • Periodic Table of Elements
    Provides comprehensive data for each element of the periodic table of elements including up to 40 properties, names in 10 languages and common chemical compounds. Information also provided for 3,600 nuclides and 4,400 nuclide decay modes.

Editor's note: Some chemicals in this database contain more information than others due to the original reason this information was collected and how the compilation was accomplished.

While working with material safety data sheets (MSDS), I found that manufacturers sometimes used obscure names for constituent chemicals and I didn't always have a good idea of what I was dealing with. To resolve this problem, over the years, I compiled chemical names and identifiers into a personal database, cross referencing regulatory and health safety information when possible. Colleagues and friends eventually started suggesting that I make my data available on this website so that others could benefit from my efforts -- which I finally did in 2004. The more common, regulated and/or hazardous a chemical is, the more information I will have likely collected it.


If you are aware of any synonyms listed above that are registered trademarks, please contact us with relevant information so that trademarks can be appropriately noted.

Notes about mixtures

Some chemicals listed in this database or not pure chemical compounds, rather they are mixtures/solutions of chemicals. It is not uncommon for wide range of molar ratios of a mixture to be lumped together as "synonyms" of the same "chemical". In some instances chemicals that are very similar from a health & safety and/or regulatory standpoint also may have been lumped together.

Reference Sources

Data for this database was compiled from: hundreds of Material Safety Data Sheets (MSDS) of common industrial and household products; the Hazardous Materials Table from the United States "Code of Federal Regulations" title 49 section 172.101; the National Institute for Occupational Safety and Health Pocket Guide to Chemical Hazards; the US DOT 1996, 2000 & 2004 Emergency Response Guidebooks; U.S. National Library of Medicine and many other related resources.


WARNING: These pages are for general reference and educational purposes only and MUST NOT be relied upon as a sole source to determine regulatory compliance or where matters of life and health are concerned. This site and the author do not warrant or guarantee the accuracy or the sufficiency of the information provided and do not assume any responsibility for its use.

To ensure regulatory compliance when transporting hazardous materials or dangerous goods, one must receive proper training and certification from a qualified instructor and refer to the current year's Code of Federal Regulations Title 49 (49CFR) or your country's shipping regulations. In matters regarding workplace safety, refer to current OSHA regulations (29CFR) and NIOSH guidelines or your own country's health and safety regulations. No one should ever enter into a hazardous environment without proper training from qualified instructors.

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