CAS reference index
Reference pages for the 50 most-traded industrial chemicals by CAS number. Each page covers regulatory listing status across EU REACH, US TSCA, China IECSC, Korea K-REACH, and Australia AICIS; transport classification and GHS hazard profile; HS code; common applications; and operator notes for sourcing from Chinese factories.
Authoritative regulator portals are the source for any shipping decision. Use this index to look up. Use the regulator's portal to file.
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Acetic acid
乙酸CAS 64-19-7 ·C2H4O2 ·HS 291521Vinyl acetate monomer (PTA upstream), Textile printing, Food preservative (vinegar)
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Acetone
丙酮CAS 67-64-1 ·C3H6O ·HS 291411Solvent (paint, coatings, nail polish remover), Methyl methacrylate (MMA) feedstock, Bisphenol A intermediate
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Acetonitrile
乙腈CAS 75-05-8 ·C2H3N ·HS 292690HPLC mobile phase, Pharmaceutical synthesis (extraction, recrystallisation), Lithium-ion battery electrolyte
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Ammonium hydroxide
氢氧化铵CAS 1336-21-6 ·NH4OH ·HS 282814Cleaning chemicals, Fertiliser intermediate, Photographic processing
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Ammonium sulfate
硫酸铵CAS 7783-20-2 ·(NH4)2SO4 ·HS 310221Nitrogen-sulfur fertiliser, Resin synthesis, Animal feed additive (low-grade)
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Benzene
苯CAS 71-43-2 ·C6H6 ·HS 290220Styrene production (via ethylbenzene), Cumene (phenol/acetone upstream), Cyclohexane (nylon upstream)
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Calcium carbonate
碳酸钙CAS 471-34-1 ·CaCO3 ·HS 283650Plastics filler, Paper coating, Paint extender
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Calcium hydroxide
氢氧化钙CAS 1305-62-0 ·Ca(OH)2 ·HS 282520Construction (mortar, plaster), Wastewater treatment, Sugar refining
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Calcium oxide
氧化钙CAS 1305-78-8 ·CaO ·HS 282510Steel production (slag former), Construction (mortar, cement), Sugar refining
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Carbon dioxide
二氧化碳CAS 124-38-9 ·CO2 ·HS 281121Beverage carbonation, Food freezing (dry ice), Welding shield gas
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Chlorine
氯气CAS 7782-50-5 ·Cl2 ·HS 280110Chlor-alkali (HCl, NaOH co-products), Water disinfection, PVC manufacture (via VCM)
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Citric acid
柠檬酸CAS 77-92-9 ·C6H8O7 ·HS 291814Beverages (acidulant), Confectionery, Detergent builder
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Copper
铜CAS 7440-50-8 ·Cu ·HS 740311Electrical wiring, Plumbing tubes, Brass and bronze alloys
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Dibutyl phthalate
邻苯二甲酸二丁酯CAS 84-74-2 ·C16H22O4 ·HS 291732PVC plasticiser (legacy), Adhesives and sealants (legacy), Printing inks (declining)
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Dichloromethane
二氯甲烷CAS 75-09-2 ·CH2Cl2 ·HS 290312Paint stripping (industrial), Pharmaceutical extraction, Polyurethane foam blowing (legacy)
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Ethanol
乙醇CAS 64-17-5 ·C2H6O ·HS 220710Solvent (paints, inks, fragrances), Fuel (E10, E85), Hand sanitiser
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Formaldehyde
甲醛CAS 50-00-0 ·CH2O ·HS 291211Urea-formaldehyde resin (particle board), Melamine-formaldehyde resin (laminate), Phenol-formaldehyde (plywood)
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Hydrochloric acid
盐酸CAS 7647-01-0 ·HCl ·HS 280610pH adjustment, Steel pickling, Mining (ore leaching)
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Hydrogen peroxide
过氧化氢CAS 7722-84-1 ·H2O2 ·HS 284700Pulp bleaching, Wastewater treatment, Disinfectant
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Hydrogen sulfide
硫化氢CAS 7783-06-4 ·H2S ·HS 281119Sulfur recovery (refinery sour gas), Heavy water production, Sulfide mineral concentration
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Iodine
碘CAS 7553-56-2 ·I2 ·HS 280120X-ray contrast media, Pharmaceutical synthesis, Animal feed (iodised salt)
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Isopropyl alcohol
异丙醇CAS 67-63-0 ·C3H8O ·HS 290512Hand sanitiser and disinfectant, Solvent (cosmetics, electronics), Semiconductor cleaning
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Manganese dioxide
二氧化锰CAS 1313-13-9 ·MnO2 ·HS 282010Alkaline battery cathode, Lithium-ion battery cathode (some chemistries), Glass decolourising
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Methanol
甲醇CAS 67-56-1 ·CH3OH ·HS 290511Methanol-to-olefins (MTO), Formaldehyde production, MTBE/biodiesel
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Methyl ethyl ketone
甲乙酮CAS 78-93-3 ·C4H8O ·HS 291412Solvent (paints, coatings, adhesives), Vinyl coatings, Magnetic tape coating
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Monoethylene glycol
乙二醇CAS 107-21-1 ·C2H6O2 ·HS 290531Polyester (PET resin and fibre), Antifreeze and coolant, Polyester resin
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n-Hexane
正己烷CAS 110-54-3 ·C6H14 ·HS 290110Vegetable oil extraction (soy, canola), Pharmaceutical synthesis, Polymerisation solvent
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Nitrogen
氮气CAS 7727-37-9 ·N2 ·HS 280430Inert blanketing (chemical reactors, food packaging), Cryogenic freezing (liquid N2), Semiconductor manufacturing
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Oxygen
氧气CAS 7782-44-7 ·O2 ·HS 280440Steel production (basic oxygen furnace), Medical oxygen, Welding and cutting
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Phosphorus (red)
红磷CAS 7723-14-0 ·P ·HS 280470Match heads (safety match), Pyrotechnics, Flame retardant for plastics
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Phosphorus pentoxide
五氧化二磷CAS 1314-56-3 ·P2O5 ·HS 280910Drying agent (laboratory), Phosphate fertiliser intermediate, Optical glass
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Potassium hydroxide
氢氧化钾CAS 1310-58-3 ·KOH ·HS 281520Potassium soaps and detergents, Biodiesel (transesterification catalyst), Alkaline battery electrolyte
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Potassium iodide
碘化钾CAS 7681-11-0 ·KI ·HS 282760Thyroid medication (radiation protection), X-ray contrast media, Iodised salt fortification
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Potassium persulfate
过硫酸钾CAS 7727-21-1 ·K2S2O8 ·HS 283340Emulsion polymerisation initiator (PVC, PVA, latex), Hair-dye oxidiser, Etching of printed circuit boards
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Sodium bicarbonate
碳酸氢钠CAS 144-55-8 ·NaHCO3 ·HS 283630Food (leavening, pH), Pharmaceutical antacid, Flue-gas desulfurisation
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Sodium bromide
溴化钠CAS 7647-15-6 ·NaBr ·HS 282710Oil and gas drilling (completion fluid), Photography (legacy), Pharmaceutical sedatives (legacy)
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Sodium carbonate
碳酸钠CAS 497-19-8 ·Na2CO3 ·HS 283620Glass manufacture (largest single use), Detergent builder, Pulp and paper
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Sodium chlorate
氯酸钠CAS 7775-09-9 ·NaClO3 ·HS 282911Pulp bleaching (via ClO2 generation), Herbicide manufacture, Pyrotechnics
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Sodium chloride
氯化钠CAS 7647-14-5 ·NaCl ·HS 250100Chlor-alkali (NaOH/Cl2 production), Food preservation, De-icing (road salt)
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Sodium fluoride
氟化钠CAS 7681-49-4 ·NaF ·HS 282619Toothpaste (anti-cavity), Water fluoridation, Pesticides
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Sodium hydroxide
氢氧化钠CAS 1310-73-2 ·NaOH ·HS 281511Pulp and paper, Aluminum extraction (Bayer process), Soap and detergent
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Sodium hypochlorite
次氯酸钠CAS 7681-52-9 ·NaClO ·HS 282890Water disinfection, Industrial cleaning, Pulp bleaching
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Styrene
苯乙烯CAS 100-42-5 ·C8H8 ·HS 290250Polystyrene (PS, EPS, GPPS, HIPS), ABS resin, Styrene-butadiene rubber (SBR)
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Sulfuric acid
硫酸CAS 7664-93-9 ·H2SO4 ·HS 280700Phosphate fertiliser production, Lead-acid batteries, Mineral processing
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Titanium dioxide
二氧化钛CAS 13463-67-7 ·TiO2 ·HS 320611Architectural and industrial coatings, Plastics masterbatch, Paper coating
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Toluene
甲苯CAS 108-88-3 ·C7H8 ·HS 290230Toluene diisocyanate (TDI, polyurethanes), Solvent (paints, inks), Octane booster in gasoline
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Urea
尿素CAS 57-13-6 ·CH4N2O ·HS 310210Nitrogen fertiliser (largest use), AdBlue / DEF (diesel emission), Animal feed additive
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Xylene (mixed isomers)
混合二甲苯CAS 1330-20-7 ·C8H10 ·HS 290244Para-xylene → PTA → polyester, Solvent (paints, lacquers), Phthalic anhydride (via o-xylene)
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Zinc
锌CAS 7440-66-6 ·Zn ·HS 790111Galvanising (steel coating), Die-cast alloys, Brass production
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Zinc oxide
氧化锌CAS 1314-13-2 ·ZnO ·HS 281700Rubber compounding (vulcanisation activator), Cosmetics (sunscreen), Pharmaceutical (calamine lotion)