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aniline oxide quinone

aniline oxide quinone, Total:251 items.

In the international standard classification, aniline oxide quinone involves: Analytical chemistry, Inorganic chemicals, Organic chemicals, Fuels, Products of the chemical industry, Raw materials for rubber and plastics, Paint ingredients, Optics and optical measurements, Plastics, Petroleum products in general, Air quality, Vocabularies, Occupational safety. Industrial hygiene, Photography, Sugar. Sugar products. Starch, Test conditions and procedures in general, Protection against dangerous goods, Paints and varnishes, Water quality, Edible oils and fats. Oilseeds, Non-ferrous metals, Refractories, Spices and condiments. Food additives, Iron and steel products, Rubber and plastics products, Protection against crime, Adhesives, Metalliferous minerals.


Japanese Industrial Standards Committee (JISC), aniline oxide quinone

Taiwan Provincial Standard of the People's Republic of China, aniline oxide quinone

KR-KS, aniline oxide quinone

  • KS M 8173-2005(2023) 2,6-Dibromo-N-chloro-p-benzoquinone monoimine(reagent)
  • KS M 8516-2004(2023) N, N-Dimethylpphenylenediammonium dichloride
  • KS I ISO 6767-2021 Ambient air — Determination of the mass concentration of sulfur dioxide —Tetrachloromercurate(TCM)/pararosaniline method

Korean Agency for Technology and Standards (KATS), aniline oxide quinone

  • KS M 8173-2005 2,6-Dibromo-N-chloro-p-benzoquinone monoimine(reagent)
  • KS M 8173-1985 2,6-Dibromo-N-chloro-p-benzoquinone monoimine(reagent)
  • KS M ISO 1618-2002(2012) Aluminium oxide primarily used for the production of aluminium-Determination of vanadium content-N-Benzoyl-N-phenylhydroxylamine photometric method
  • KS M ISO 805-2003(2018)
  • KS M ISO 2072-2002(2012) Aluminium oxide primarily used for the production of aluminium-Determination of zinc content-PAN photometric method
  • KS M 4825-2002 Sodium 4 hydroxy-1-naphthalene sulfonate[neville and winthers acid(sodium salt)]
  • KS I ISO 6767:2021 Ambient air — Determination of the mass concentration of sulfur dioxide —Tetrachloromercurate(TCM)/pararosaniline method
  • KS I ISO 6767-2006(2016) Ambient air-Determination of the mass concentration of sulphur dioxide [Tetrachloromercurate (TCM)/pararosaniline method]
  • KS M 8516-2004 N, N-Dimethylpphenylenediammonium dichloride
  • KS M 3829-2003 Testing methods for total amine values of amine-based hardeners of epoxide resins
  • KS M 3829-2003(2018)
  • KS M ISO 9702-2002(2017) Plastics-Amine epoxide hardners-Determination of primary, secondary and tertiary amine group nitrogen content
  • KS M ISO 9702-2002(2022) Plastics-Amine epoxide hardners-Determination of primary, secondary and tertiary amine group nitrogen content

United States Navy, aniline oxide quinone

RO-ASRO, aniline oxide quinone

HU-MSZT, aniline oxide quinone

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, aniline oxide quinone

  • GB/T 6609.10-1986 Methods for the chemical analysis of aluminium oxide--The N-benzoyl-N-phenylhydroxylamine extraction photometric method for the determination of vanadic oxide content
  • GB/T 24800.12-2009 Determination of p-phenylenediamine,o-phenylenediamine and m-phenylenediamine in cosmetics
  • GB/T 691-1994 Chemical reagent. Aniline
  • GB/T 691-2012 Chemical reagent.Aniline
  • GB/T 681-1994 Chemical reagent. Diphenylamine
  • GB/T 6609.10-2004 Chemical analysis methods and determination of physical performance of alumina Determination of vanadic oxide content-N-benzoyI-N-phenylhydroxylamine extraction photometric method
  • GB/T 8829-1988 Vulcanization accelerator NOBS (N-oxydiethylene-2-benzothiazyl sulfonamide)
  • GB 8829-1988 Vulcanization accelerator NOBS (N-oxydiethylene-2-benzothiazyl sulfenamide)
  • GB/T 4372.5-1984 Methods for chemical analysis of zinc oxide(direct process)--The anthraquinone method for the detection of metallic zinc
  • GB/T 1832-1979 Determination of magnesium oxide content in tin concentrates--Xylidyl blue 2 photometric method
  • GB/T 6609.18-1986 Methods for the chemical analysis of aluminium oxide--The N,N-dimethyl-P-phenylenediamine photometric method for the determination of sulfate content
  • GB/T 16025-1995 Workplace air--Determination of sulfur dioxide--Pararosaniline hydrochloride spectrophotometric method
  • GB/T 8970-1988 Air quality--Determination of sulfur dioxide in a ambient air--Tetrachlomercurate(TCM), pararosaniline
  • GB/T 15262-1994 Ambient air-Determination of sulfur dioxide-Formaldehyde absorbing-pararosaniline spectrophotometry
  • GB/T 11200.1-2006 Sodium hydroxide for industrial use. Determination of sodium chlorate content. o-Tolidine spectrometric method
  • GB 8970-1988 Determination of sulfur dioxide in air quality Tetrachloromercuric salt - pararosaniline hydrochloride colorimetric method
  • GB/T 33088-2016 Chemical reagent.Pararosaniline hydrochloride solution
  • GB/T 26458-2011 Fatty alkyl dimethyl amine oxides
  • GB/T 16105-1995 Workplace air--Determination of vanadium pentoxide--N-cinnamoyl-o-tolyl-hydroxylamine spectrophotometric method
  • GB/T 11200.1-1989 Membrane process sodium hydroxide--Determination of sodium chlorate content--Tolidine spectrometric method
  • GB/T 33089-2016 Chemical reagent.N,N-dimethyl-p-phenylenediamine dihydrochloride
  • GB/T 4921-1985 Waste gas from manufacturing process--Determination of chemical oxygen demand and nitrogen oxide--Potassium dichromate oxidation and naphthylethylene diamine colorimetric method
  • GB/T 8762.1-1988 Yttrium oxide and europium oxide of phosphor grade--Determination of total rare earth oxide content--EDTA volumetric method
  • GB/T 15917.3-1995 Dysprosium and dysprosium oxide--Determination of tantalum content--Para-chloride phenylfluorone--cetyl trimethyl ammonium bromide--ethanol spectrophotometric method
  • GB/T 6900.7-1986 Fireclay and high-alumina refractories--Determination of magnesium oxide content--Xylidyl blue I-CTAB photometric method
  • GB 19825-2005 Food additive.Diluted benzoyl peroxide
  • GB/T 11889-1989 Water quality--Determination of aniline compounds--Spectrophotometric method with N-(1-naphthyl) ethylenediamine
  • GB/T 6609.8-1986 Methods for chemical analysis of aluminium oxide--The diphenyl carbazide photometric method for the determination of chromium sesquioxide content
  • GB/T 3257.12-1999 Methods for chemical analysis of bauxite--Determination of vanadium pentoxide content--N-benzoyl-N-phenythyroxylamine photometric method

RU-GOST R, aniline oxide quinone

  • GOST 7423-1955 Aviation petrols. Determination of paraoxydiphenylamine content
  • GOST R 53099-2009 Aminal and vegetable fats and oils. Determination of anisidine value
  • GOST 14888-1978 Benzoyl peroxide technical. Specifications
  • GOST 12329-1977 Petroleum products and hydrocarbon solvents. Method for determination of aniline point and aromatic hydrocarbons
  • GOST 10587-1984 Uncured epoxy resins. Specifications

Professional Standard - Agriculture, aniline oxide quinone

Professional Standard - Chemical Industry, aniline oxide quinone

  • HG/T 5951~5952-2021 o-Methoxyacetoacetanilide and o-chloroacetoacetanilide (2021)
  • HG/T 4557-2013 The catalyst for nitrobenzene hydrogenation to aniline
  • HG/T 5949~5950-2021 Red base KD (3-amino-4-methoxy-benzoanilide) and naphthol AS-IRG (4-chloro-2,5-dimethoxyacetoacetanilide) (2021)
  • HG/T 3415-2010 Red base B(2-Methoxy-4-nitroaniline)
  • HG/T 4681-2014 Analytical method of chemical composition in the catalyst for nitrobenzene hydrogenation to aniline
  • HG/T 2717-1995 Industrial Benzoyl Peroxide
  • HG/T 4063-2008 Technical ethoxylated fatty amine
  • HG/T 3407-2010 Scarlet base RC (2- Methoxy-5-nitroaniline hydrochloride)
  • HG/T 2717-2014 Dibenzoyl peroxide for industrial use
  • HG/T 3875-2006 Phenol aldehyde amine epoxy resin firming agent
  • HG/T 4871-2016 tert-Butyl peroxy benzoate for industrial use
  • HG/T 5072~5074-2016 2,4,6-Trimethylbenzoyldiphenylphosphine oxide, bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and 2-dimethylamino-2-benzyl-1 -[4-(4-Morpholinyl)phenyl]-1-butanone (2016)
  • HG/T 5484~5487-2018 Optical brightener OB-3, 2-methoxy-5-methylaniline-4-hydroxyethyl sulfone sulfate, 2-cyano-4-nitro-6-bromoaniline and 3-amino-5- Nitro-2,1-Benzisothiazole (2018)
  • HG/T 5488~5491-2018 CI Acid Red 405, Acid Black ATT, o-methoxyaniline-p-hydroxyethylsulfone sulfate and o-chlorobenzonitrile (2018)
  • HG 2684-1995 Food Additive Diluted Benzoyl Peroxide

工业和信息化部, aniline oxide quinone

Professional Standard - Commodity Inspection, aniline oxide quinone

  • SN/T 3920-2014 Determination of hydroquinone, salicylic acid,phenol,2-phenoxyethanol, methyl 4-hydroxybenzoic acid easters, dichlorophen and triclosan in cosmetics for export.Liquid chromatography method
  • SN/T 3153-2012 Determination of N,N-bis(2-hydroxyethyl)-p-phenylenediamine,N,N-dimethyl-p-phenylenediamine,N,N-diethyl-p-phenylenediamine,N-phenyl-p-phenylenediamine and their salts in oxidative hair dyes for export.High performance liquid chromatography
  • SN/T 3829-2014 Determination of 2-nitro-1,4-benzenediamine and its salts in oxidative hair dyes for import and export.High performance liquid chromatography

Group Standards of the People's Republic of China, aniline oxide quinone

  • T/SDSES 015-2023 2-Methyl-4-methoxy diphenylamine by-product sodium bromide aqueous solution
  • T/QAS 018-2020 Determination of Potassium Oxide Content in Potassium Chloride Sodium Tetraphenylborate Quaternary Ammonium Salt Volumetric Method
  • T/GZZJ 10-2019 Determination of Hydroquinone and Phenol in Cosmetics by High Performance Liquid Chromatography
  • T/GDCDC 006-2018 Fatty acid amidopropyl amine oxide for daily chemicals use
  • T/CSTM 00179-2020 Chemical reagent — Dibenzoyl peroxide
  • T/WSJD 18.13-2021 Determination of hydroquinone, resorcinol, catechol, p-nitrophenol and 2,4-dinitrophenol by high performance liquid chromatography for chemical factors in workplace air
  • T/SDHCIA 023-2022 Hydrogen peroxide isopropylbenzene propylene oxide plant by-product—phenol
  • T/SDHCIA 024-2022 Hydrogen peroxide isopropylbenzene to propylene oxide plant by-product—ethylbenzene
  • T/CPCIF 0090-2021 Di(4-methylbenzoyl) peroxide for industrial use
  • T/CPCIF 0015-2018 Bis-(2,4-dichlorobenzoyl) peroxide for industrial use
  • T/CPCIF 0025-2019 Byproduct of tetramethylammonium hydroxide—Trimethylamine aqueous solution

Shandong Provincial Standard of the People's Republic of China, aniline oxide quinone

  • DB37/T 2654-2015 Determination of hydroquinone and phenol in cosmetics by high performance liquid chromatography

Association Francaise de Normalisation, aniline oxide quinone

  • NF T20-209:1973 Aluminium oxide primarily used for the production of aluminium. Determination of vanadium. N-benzoyl-n-phenyl-hydroxylamine photometric method.
  • NF EN 1791:1997 Agents de surface - Oxydes d'alkyldiméthylamine grasses - Détermination de la teneur en oxyde d'amine.
  • NF T73-322*NF EN 1791:1997 Surface active agents. Fatty alkyl dimethyl amine oxides. Determination of the amine oxide content.

Qinghai Provincial Standard of the People's Republic of China, aniline oxide quinone

  • DB63/T 1318-2014 Determination of Potassium Oxide Content in Potassium Chloride Sodium Tetraphenylborate Quaternary Ammonium Salt Volumetric Method
  • DB63/T 1423-2015 Determination of Potassium Oxide Content in Potassium Nitrate Sodium Tetraphenylborate Quaternary Ammonium Salt Volumetric Method

ES-UNE, aniline oxide quinone

  • UNE 84127:2021 Cosmetic raw materials.Determination of free chloroanilines in trichlorocarbanilide.
  • UNE 84690:2018 Cosmetic raw materials. Sunscreens. Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine.

Anhui Provincial Standard of the People's Republic of China, aniline oxide quinone

  • DB34/T 1533-2011 Determination of phenylenediamines in oxidation hair dyes Gas Chromatography-Mass Spectrometry method

YU-JUS, aniline oxide quinone

  • JUS H.B8.606-1979 Aluminium oxide primarily used for the production of aluminium. Determination ofvanadium content. N-Benzoyl-N-phenylhydroxy lamine photometric method

American Society for Testing and Materials (ASTM), aniline oxide quinone

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会, aniline oxide quinone

  • GB/T 33649-2017 Determination of oxygenates and aniline compounds in motor gasoline—Gas chromatography

European Committee for Standardization (CEN), aniline oxide quinone

  • EN 1791:1997 Surface active agents - Fatty alkyl dimethyl amine oxides - Determination of the amine oxide content
  • EN ISO 9702:1998 Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content (ISO 9702:1996)

German Institute for Standardization, aniline oxide quinone

  • DIN EN 1791:1997 Surface active agents - Fatty alkyl dimethyl amine oxides - Determination of the amine oxide content; German version EN 1791:1997
  • DIN EN ISO 9702:1998-10 Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content (ISO 9702:1996); German version EN ISO 9702:1998
  • DIN EN 1791:1997-03 Surface active agents - Fatty alkyl dimethyl amine oxides - Determination of the amine oxide content; German version EN 1791:1997
  • DIN EN ISO 9702:1998 Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content (ISO 9702:1996); German version EN ISO 9702:1998

(U.S.) Ford Automotive Standards, aniline oxide quinone

AENOR, aniline oxide quinone

  • UNE 84641:2002 Cosmetic raw materials. 3,4,4'-trichlorocarbanilide.
  • UNE-EN 1791:1997 Surface active agents - Fatty alkyl dimethyl amine oxides - Determination of the amine oxide content
  • UNE-EN ISO 9702:1999 PLASTICS - AMINE EPOXIDE HARDENERS - DETERMINATION OF PRIMARY, SECONDARY AND TERTIARY AMINE GROUP NITROGEN CONTENT (ISO 9702:1996)
  • UNE 84091:2012 Cosmetic raw materials. Phenoxyethanol.
  • UNE 77234:1998 AMBIENT AIR. DETERMINATION OF THE MASS CONCENTRATION OF SULFUR DIOXIDE. TETRACHLOROMERCURATE (TCM)/PARAROSANILINE METHOD.
  • UNE 84684:2006 Cosmetic raw materials. Phenyl trimethicone.

BE-NBN, aniline oxide quinone

  • NBN T 52-079-1985 Petroleum products and hydrocarbon solvents - Deter-mination of aniline point and mixed aniline point

International Organization for Standardization (ISO), aniline oxide quinone

  • ISO 2977:1974 Petroleum products and hydrocarbon solvents — Determination of aniline point and mixed aniline point
  • ISO 9702:1996 Plastics - Amine epoxide hardeners - Determination of content of primary, secondary and tertiary amine group nitrogen content

Danish Standards Foundation, aniline oxide quinone

  • DS/EN 1791:1998 Surface active agents - Fatty alkyl dimethyl amine oxides - Determination of the amine oxide content
  • DS/EN ISO 9702:1999 Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content

Lithuanian Standards Office , aniline oxide quinone

  • LST EN 1791-2002 Surface active agents - Fatty alkyl dimethyl amine oxides - Determination of the amine oxide content
  • LST EN ISO 9702:2001 Plastics - Amine epoxide hardeners - Determination of primary, secondary and tertiary amine group nitrogen content (ISO 9702:1996)

British Standards Institution (BSI), aniline oxide quinone

  • BS EN 1791:1997 Surface active agents - Fatty alkyl dimethyl amine oxides - Determination of the amine oxide content
  • BS EN ISO 9702:1999 Plastics. Amine epoxide hardeners. Determination of primary, secondary and tertiary amine group nitrogen content
  • BS EN ISO 6885:2016 Tracked Changes. Animal and vegetable fats and oils. Determination of anisidine value

Universal Oil Products Company (UOP), aniline oxide quinone

TR-TSE, aniline oxide quinone

  • TS 1871-1975 ALUMINIUM OXIDE PRIMARILY USED FOR THE PRODUCTION OF ALUMINIUM DETERMINATION OF VANAD?UM CONTENT PHOTOMETRIC METHOD USING N-BENZOYL-N-PHENYLHYDROXYLAMINE

Professional Standard - Public Safety Standards, aniline oxide quinone

  • GA/T 2047-2023
  • GA/T 1791-2021 Gas chromatography and gas chromatography-mass spectrometry for the detection of seven phenethylamines including 2,5-dimethoxy-4-ethylphenethylamine in suspected drugs in forensic science
  • GA/T 1927-2021 Liquid Chromatography and Liquid Chromatography-Mass Spectrometry for the Detection of Seven Phenylethylamines Including 2,5-Dimethoxy-4-Ethylphenethylamine in Suspected Drugs in Forensic Science

Professional Standard - Environmental Protection, aniline oxide quinone

  • HJ 482-2009 Ambient air.Determination of sulfur dioxide.Formaldehyde absorbing.pararosaniline spectrophotometry
  • HJ 483-2009 Ambient air.Determination of sulfur dioxide.Tetrachloromercurate(TCM)-paraosaniline method
  • HJ 482-2009(XG1-2018) Determination of sulfur dioxide in ambient air Formaldehyde absorption-pararosaniline spectrophotometric method "No. 1 Amendment"
  • HJ 479-2009 Ambient air.Determination of nitrogen oxides.N-(1-Naphthyl)ethylene diamine dihydrochloride spectrophotometric method
  • HJ 1210-2021 Determination of 13 Anilines and 2 Benzidines in Soil and Sediment by Liquid Chromatography-Triple Quadrupole Mass Spectrometry
  • HJ 822-2017 Water Quality Determination of Aniline Compounds Gas Chromatography-Mass Spectrometry
  • HJ 483-2009(XG1-2018) Determination of sulfur dioxide in ambient air Tetrachloromercuric salt absorption-pararosaniline spectrophotometric method "No. 1 Amendment"

Military Standard of the People's Republic of China-General Armament Department, aniline oxide quinone

Military Standards (MIL-STD), aniline oxide quinone

Hunan Provincial Standard of the People's Republic of China, aniline oxide quinone

  • DB43/T 2200-2021 Determination of 3,4-Methylenedioxymethamphetamine (MDMA) and 3,4-Methylenedioxyamphetamine (MDA) in Aquatic Environments by Liquid Chromatography-Tandem Mass Spectrometry

Society of Automotive Engineers (SAE), aniline oxide quinone

  • SAE AMS3099A-1992 CURING AGING, SOLID AROMATIC AMINE, 4,4’ - DIAMINODIPHENYL SULFONE
  • SAE AMS3099-1991 CURING AGENT, SOLID AROMATIC AMINE 4,4' -Diaminodiphenyl Sulfone
  • SAE AMS3702-1995 EPOXY RESIN, TETRAGLYCIDYL METHYLENEDIANILINE 14,000 - 18,000 Centipoise Viscosity
  • SAE AMS-R-81903-2008 Remover, Acid Activated, For Amine-Cured Epoxy Coating Systems
  • SAE AMS-R-81903A-2021 Remover, Acid Activated, For Amine-Cured Epoxy Coating Systems
  • SAE AMS3730-1991 Potting Compound, Foamed Epoxy Type, Amine Hardened
  • SAE AMS3675A-1956 Potting Compound, Foamed Epoxy Type, Amine Hardened
  • SAE AMS3702A-1993 EPOXY RESIN, TETRAGLYCIDYL METHYLENEDIANILINE 14,000 TO 18,000 Centipoise Viscosity
  • SAE AMS3702B-1984 Epoxy Resin, Tetraglycidyl Methylenedianiline, 14,000 to 18,000 Centipoise Viscosity
  • SAE AMS3701-1995 EPOXY RESIN, TETRAGLYCIDYL METHYLENEDIANILINE (TGMDA) 10,000 – 14,000 Centipoise Viscosity
  • SAE AMS3701A-1993 EPOXY RESIN, TETRAGLYCIDYL METHYLENEDIANILINE (TGMDA) 10,000 TO 14,000 Centipoise Viscosity

US-CFR-file, aniline oxide quinone

  • CFR 40-721.10308-2013 Protection of Environment. Part721:Significant new uses of chemical substances. Section721.10308:Ethoxylated, propoxylated diamine diaryl substituted phenylmethane ester with alkenylsuccinate, dialkylethanolamine salt (generic).

国家市场监督管理总局、中国国家标准化管理委员会, aniline oxide quinone

国家质量监督检验检疫总局, aniline oxide quinone

  • SN/T 4469-2016 Inspection Regulations for Import and Export of Hazardous Chemicals Aniline

SAE - SAE International, aniline oxide quinone

  • SAE AMS3099B-1995 CURING AGING@ SOLID AROMATIC AMINE@ 4@4' - DIAMONODIPHENYL SULFONE
  • SAE AMS3730-1988 POTTING COMPOUNO@ FOAMED EPDXY TYPE Amine Hardened
  • SAE AMS3702B-1995 EPOXY RESIN@ TETRAGLYCIDYL METHYLENEDIANILINE 14@ 000 TO 18@000 CENTIPOISE VISCOSITY

UNKNOWN, aniline oxide quinone

IN-BIS, aniline oxide quinone

PL-PKN, aniline oxide quinone

  • PN C04600 ArkusZ14-1974 Water and waste water Tests for ehlorine and his com- pounds content and ehlorine demand Determination of ehlorine dioxideby colorimetric orthotolidine-arse- nite method
  • PN BN 6023-01-1966

Association of German Mechanical Engineers, aniline oxide quinone

  • VDI 2451 Blatt 3-1996 Measurement of gaseous immissions - Measurement of sulphur dioxide concentration - Tetrachloromercurate Pararosaniline (TCM) Method

中华人民共和国环境保护部, aniline oxide quinone

  • GB 4921-1985 Waste gas from manufacturing process-Determination of chemical oxygendemand and nitrogen oxide-Potassium dichromate oxidation and naphthylethylene diamine colorimetric method
  • GB 11889-1989 Water quality-Determination of auiline compounds-Spectrophotometric method with N-(1-naphthyl)echylenediamine

Natural Gas Processor's Association (NGPA), aniline oxide quinone

  • GPA RR-43-1980 Equilibrium Phase Properties of Selected m-Xylene and Mesitylene Binary Systems: m-Xylene - Hydrogen Sulfide Mesitylene - Hydrogen Sulfide Mesitylene - Carbon Dioxide
  • GPA RR-104-1987 Equilibrium Solubility of Carbon Dioxide or Hydrogen Sulfide in Aqueous Solutions of Monoethanolamine, Diglycolamine, Diethanolamine and Methyldiethanolamine

U.S. Military Regulations and Norms, aniline oxide quinone

Chongqing Provincial Standard of the People's Republic of China, aniline oxide quinone

  • DB50/T 503-2013 Determination of dicumyl peroxide content in paint industry (redox capacity method)

Professional Standard - Non-ferrous Metal, aniline oxide quinone

  • YS/T 575.12-2006 Method for chemical analysis of bauxite ore- Benzoyl phenylene spectrophotometric method for the determination of vanadium pentoxide




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