Chemical Database

D & C Red No. 9


  • CAS Number: 5160-02-1
  • Synonyms/Related:
    • 1-(4-Chloro-o-sulfo-5-tolylazo)-2-naphthol, barium salt
    • 1-(4-Chloro-o-sulpho-5-tolylazo)-2-naphthol, barium salt
    • 1860 Red
    • 5-Chloro-2-((2-hydroxy-1-naphthalenyl) azo)-4-methylbenzenesulfoni- c acid, barium salt(2:1)
    • 5-Chloro-2-((2-hydroxy-1-naphthalenyl) azo)-4-methylbenzenesulfonic acid, barium salt (2:1)
    • 5-Chloro-2-((2-hydroxy-1-naphthyl) azo)-p-toluenesulfonic acid, barium salt
    • Astro Orange
    • Atomic Red
    • Barium bis(2-chloro-5-((2-hydroxy-1-naphthyl) azo) toluene-4-sulphonate)
    • Benzenesulfonic acid, 5-chloro-2-((2-hydroxy-1-naphthalenyl) azo)-4-methyl-, barium salt (2:1)
    • Benzenesulfonic acid, 5-chloro-2-((2-hydroxy-1-naphthalenyl) azo)-4-methyl-, barium salt(2:1)
    • Brilliant Red
    • Bronze Red 16913 Yellowish
    • Bronze Red RO
    • Bronze Scarlet CA
    • Bronze Scarlet CBA
    • Bronze Scarlet CT
    • Bronze Scarlet CTA
    • Bronze Scarlet Toner
    • Carnation Red
    • CI Pigment Red 53, barium salt (2:1)
    • Cosmetic Coral Red KO Bluish
    • Cosmetic DVR
    • Cosmetic Pigment Yellow Red DVR
    • D & C Red No. 9
    • D and C Red No. 9
    • D&C RED #9
    • D&C Red 9
    • D&C Red No. 9
    • Dainichi Lake Red C
    • Desert Red
    • Eljon Lake Red C
    • Hamilton Red
    • Helio Red Toner LCLL
    • Irgalite Red CBN
    • Irgalite Red CBR
    • Irgalite Red CBT
    • Irgalite Red MBC
    • Isol Lake Red LCS 12527
    • Isol Red LCR 2517
    • Japan Red 204
    • Japan Red No. 204
    • Lake Red 1520
    • Lake Red C
    • Lake Red C 18287
    • Lake Red C 21245
    • Lake Red C 27200
    • Lake Red C 27217
    • Lake Red C 27218
    • Lake Red C Barium Toner
    • Lake Red C RLC-232 (barium)
    • Lake Red C Toner 8195
    • Lake Red C Toner 8366
    • Lake Red CBA
    • Lake Red CC
    • Lake Red CCT
    • Lake Red CR
    • Lake Red CRLC-232 (barium)
    • Lake Red GB barium salt
    • Lake Red RRG
    • Lake Red Toner C
    • Lake Red Toner LCLL
    • Lake Red ZHB
    • Latexol Scarlet R
    • Latexol Scarlet R Solupowder
    • Ld Rubber Red 16913
    • Lutetia Red CLN
    • Lutetia Red CLN-ST
    • Microtex Lake Red CR
    • Mohican Red A-8008
    • No.3 Conc. Bronze Scarlet
    • No.3 Conc. Scarlet
    • Paridine Red LCL
    • Pigment Lake Red BFC
    • Pigment Lake Red CD
    • Pigment Lake Red LC
    • Pigment Red (53:1) barium salt
    • Pigment Red 53:1
    • Pigment Red CD
    • Potomac Red
    • Recolite Red Lake C
    • Recolite Red Lake CR
    • Red 16913H
    • Red 1860
    • Red For Lake C
    • Red For Lake C Toner RA-5190
    • Red For Lake Toner RA-5190
    • Red Lake C
    • Red Lake C Toner
    • Red Lake C Toner 20-5650
    • Red Lake C Toner RA-5190
    • Red Lake CM 20-5650
    • Red Lake CR-1
    • Red Lake R-91
    • Red No. 204
    • Red Scarlet
    • Red Toner Z
    • Red ZhB
    • Rubber Red 16913R
    • Sanyo Lake Red C
    • Scarlet Toner Y
    • Segnale Red LC
    • Segnale Red LCG
    • Segnale Red LCL
    • Sico Lake Red 2L
    • Sumikaprint Red C-O
    • Superol Red C RT-265
    • Symuler Lake Red C
    • Termosolido Red LCG
    • Texan Red Toner D
    • Toner Lake Red C
    • Transparent Bronze Scarlet
    • Vulcafix Scarlet R
    • Vulcafix Scarlet R-D masse
    • Vulcafor Red 2R
    • Vulcan Red LC
    • Vulcol Fast Red L
    • Wayne Red X-2486


  • Boiling Point: K °C °F
  • Flammability:
    • Explosive Limits:
      • Lower Explosive Limit: 0%
      • Upper Explosive Limit: 0%
    • Flammable Limits:
      • Lower Flammable Limit: 0%
      • Upper Flammable Limit: 0%
    • Flash Point K °C °F
    • Autoignition Temperature: K °C °F
  • Melting Point: K °C °F

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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