C4 & PBT Dept.
Taking advantage of proprietary technology, the BG, PTMG, CML, GBL & NMP Gr.. has developed a wide range of products. These include 1,4-butanediol (1,4-BG) and its derivatives including tetrahydrofuran (THF) and poly(tetramethylene ether) glycol (PTMG). The group also produces maleic anhydride and its derivatives including gamma-butyrolactone (GBL) and N-methyl-2-pyrrolidone (NMP). Especially the 1,4-BG/THF joint production process has been highly valued by our customers. This technology has been exported overseas. New product development and production process innovation for our wide-ranging offerings are driven by our customers' increasingly sophisticated and diverse needs together with our tenacious pursuit of quality.
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Bio Poly(tetramethylene ether)glycol, BioPTMG
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BioPTMG is a polyether polyol manufactured from plant-derived raw materials.
BioPTMG has the same performance as petroleum-derived PTMG as a raw material for polyurethane and polyester resins and has excellent impact, wear and hydrolysis resistance, flexibility at low temperatures, etc. Taking advantage of these characteristics, it can be used in a wide range of fields, from interior and fashion to industrial materials.
- Grades:
- BioPTMG650、BioPTMG1000、BioPTMG2000、BioPTMG3000
- Japan, Chemical Substances Control Law:
- (7)-129
- Japan, Poisonous and Deleterious Substances Control Law:
- Not applicable.
- Japan, Fire Services Law:
- Hazardous Material Class 4 Petroleums No.4 Hazardous Rank III(BioPTMG650)
Combustible Materials, Flammable Solids(BioPTMG1000, 2000, 3000)

PTMG (Poly(tetramethylene ether)glycol / PTMG) is a linear polyether glycol with hydroxyl groups on both ends. As a polyol, it reacts readily with isocyanates (for example MDI, TDI), etc. to make resins with excellent properties.
- Grades:
- PTMG250、PTMG650、PTMG850、PTMG1000、PTMG1300、PTMG1500、PTMG1800、PTMG2000、PTMG3000、PTMG3200(developed grade in mass production)
- Japan, Chemical Substances Control Law:
- METI-No. 7-129
- Japan, Poisonous and Deleterious Substances Control Law:
- Not applicable.
- Japan, Fire Services Law:
- Hazardous Material Class 4 Petroleums No.3 Hazardous Rank III (PTMG250)
Hazardous Material Class 4 Petroleums No.4 Hazardous Rank III (PTMG650,850)
Combustible Materials, Flammable Solids (PTMG1000, 1300, 1500, 1800, 2000, 3000, 3200(developed grade in mass production))
Maleic Anhydride, MAH/Maleic Anhydride
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Maleic anhydride is produced by oxidation of benzene or a C4 hydrocarbon such as butane in the presence of a vanadium oxide catalyst. Maleic anhydride can be converted to maleic acid by hydrolysis and to esters by alcoholysis.
- EINECS: No. 203-571-6
- Japan, Chemical Substances Control Law: METI-No. 2-1101
- Japan, Industrial Safety and Health Law: Dangerous Goods and Toxic Substances Whose Names Should be Labeled and be Notified Appended Table 2-1978
- Japan, Poisonous and Deleterious Substances Control Law: Not applicable.
- Japan, Fire Services Law: Not applicable.
Tetrahydrofuran, THF/Tetrahydrofuran
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THF (Tetrahydrofuran) is a stable compound with relatively low boiling point and excellent solvency. It is widely-used for dissolution and reaction of various substances. Also it is used as a starting material for the synthesis of poly(tetramethylene ether) glycol (PTMG), etc. Since 1982, Mitsubishi Chemical's Tokai plant has produced high-purity, high-quality THF from butadiene using our proprietary technology.
- EINECS: No. 203-726-8
- Japan, Chemical Substances Control Law: METI-No. 5-53
- Japan, Industrial Safety and Health Law: No. 5-53
- Japan, Industrial Safety and Health Law: Dangerous Goods and Toxic Substances Whose Names Should be Labeled and be Notified Appended Table 2-1278
- Japan, Poisonous and Deleterious Substances Control Law: Not applicable.
- Japan, Fire Services Law: Hazardous Material Class 4 Petroleums No.1 (water-soluble liquid). Hazardous Rank II
- U.N. Class: 3
- U.N. No.: UN2056

NMP (N-Methyl-2-Pyrrolidone) is a polar solvent with outstanding characteristics. It has a wide range of applications because it offers very high solvency, high boiling point, low freezing point, and ease of handling.
- EINECS: No. 212-828-1
- Japan Chemical Substances Control Law: METI-No. 5-113
- Japan, Industrial Safety and Health Law: No. 8-1-1014
- Japan, Industrial Safety and Health Law: Dangerous Goods and Toxic Substances Whose Names Should be Labeled and be Notified Appended Table 2-2108
- Japan, Poisonous and Deleterious Substances Control Law: Not applicable.
- Japan, Fire Services Law: Hazardous material Class 4 Petroleums No.3 (water-soluble liquid).
Gamma-Butyrolactone, GBL/Gamma-Butyrolactone
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GBL has a wide range of practical applications because of its low freezing point, high boiling point, and a unique combination of solvent and electrical properties. It has applications as a solvent for special resins, in photography, in batteries, and as an electrolyte. Also a number of derivatives are synthesized from GBL.
- EINECS: No. 202-509-5
- Japan Chemical Substances Control Law: METI-No. 5-3337
- Japan, Industrial Safety and Health Law: No. 5-3337
- Japan, Industrial Safety and Health Law: Dangerous Goods and Toxic Substances Whose Names Should be Labeled and be Notified Appended Table 2-412
- Japan, Poisonous and Deleterious Substances Control Law: Not applicable.
- Japan, Fire Services Law: Hazardous material Class 4 Petroleums No.3 (water-soluble liquid).Aprotic, polar solvent.

12BG (1,2-butanediol) is a branched glycol that has a primary hydroxyl group and a secondary hydroxyl group on adjacent carbon atoms. Mitsubishi Chemical Corporation offers two grades of purity. Both can be reacted with a dicarboxylic acid (e.g., phthalic acid or adipic acid) for use as a polyester polyol or a plasticizer, or reacted with an unsaturated dicarboxylic acid (e.g., maleic anhydride) for use as a raw material for unsaturated polyester resin. The high-purity grade 12BG is suitable for use as a solvent for inks and as a raw material for surfactants.
- EINECS: No. 209-527-2
- Chemical Substance Control Law (CSCL): METI-No. 2-235
- Japan, Industrial Safety and Health Act (ISHA): No. 2-235
- Japan, Poisonous and Deleterious Substances Control Act: Not applicable.
- Japan, Fire Service Act:Hazardous Materials, Category IV—Class III petroleums (water soluble liquids)
14BG/1,4-Butylene glycol/1,4-Butanediol
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14BG (1,4-Butanediol) is a straight chain glycol with hydroxyl groups on both ends. It is used as a raw material for high performance polyester and polyurethane resins as well as for industrial chemicals like tetrahydrofuran and gamma-butyrolactone. Since 1982, Mitsubishi Chemical's Tokai plant has produced high-purity, high-quality 14BG from butadiene using our proprietary technology.
- EINECS: No. 203-786-5
- Japan, Chemical Substances Control Law: METI-No. 2-235
- Japan, Industrial Safety and Health Law: No. 2-235
- Japan, Poisonous and Deleterious Substances Control Law: Not applicable.
- Japan, Fire Services Law: Hazardous material Class 4 Petroleums No.3 (water-soluble liquid).
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