12BG

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.

  • CAS: No. 584-03-2 (T)
  • 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)

Inquiries

Characteristics

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12BG (1,2-butanediol) is a branched glycol with four carbons that has a primary hydroxyl group and a secondary hydroxyl group.

Common Names 1,2-Butanediol
1,2-Butylene Glycol
1,2-Dihydroxybutane
Structure 12BG
Functional groups / Classification as compound Hydroxy group (alcoholic hydroxyl group)
CAS No. 584-03-2
Japan, Chemical Substances Control Law METI-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 Hazardous Rank III
Molecular Weight 90.1
Appearance Colorless to pale yellow liquid
Odor Acetic acid smell
Specific Gravity (25/4℃) 1.002
Viscosity(mPa・s) 38(at 20℃)
Boiling Point (℃) 193
Freezing Point (℃) -42
Flash Point (℃) 110 (Cleveland open cup)
Autoignition Temperature (℃) 394
Vapor pressure (kPa) 0.0027(at 20℃)
Heat of Vaporization (kJ/mol) 61.3 (at boiling point)
Heat capacity (kJ/kg・K) 2.404(at 20℃)
Thermal conductivity (W/m・K) 0.2105(at 20℃)

Mitsubishi Chemical Corporation started producing both 1,2-butanediol and 1,4-butanediol from butadiene using proprietary technology at its Yokkaichi Plant in 1982.

Applications

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12BG exhibits excellent characteristics as a solvent for inks and as a raw material for polyester plasticizers (for PVC resins), polyester polyols (soft segment of urethane resins), and unsaturated polyester resins. These versatile products have a very wide range of applications, from general consumer goods, including everyday goods, to durable goods like electronics and automobiles, and even to industrial materials used in machine parts. Their applications are expected to further expand in the future.

Main Applications

  • Solvent for inks
    Using 12BG as a solvent for inks will greatly enhance the wettability of inks by suppressing the contact angle. Since these inks will also exhibit constant wettability for a variety of substrates, they can be widely utilized as ink solvents for inkjet printers.
  • Plasticizer for PVC resins
    Nonmigratory plasticizers can be made by reacting 12BG with an aliphatic dibasic acid such as adipic acid to form a low-molecular-weight polyester, then esterizing the terminal carboxyl group with an aliphatic alcohol such as hexanol.
  • Polyester polyol for polyurethane resins
    Polyols for urethane resins can be made by reacting 12BG with an aliphatic dibasic acid such as adipic acid or with an aromatic dibasic acid such as phthalic acid to form a low-molecular-weight polyester polyol with a terminal hydroxyl group. Urethane resins made using such polyols exhibit superior physical properties.
  • Unsaturated polyester resins
    Unsaturated polyester resins can be made by reacting 12BG with an unsaturated aliphatic dibasic acid such as maleic acid or its anhydride and with an aromatic dibasic acid such as phthalic acid to form a polyester resin, then dissolving the resin in a polymerizable monomer such as styrene monomer. The ethyl group in 12BG will enhance the solubility into polymerizable monomers, thereby providing ease in handling and allowing the production of resins with excellent water resistance.
  • Raw material for other polyester resins
    12BG can be used as a raw material for resins of adhesives.
  • Other Applications
    12BG can be used as various solvents, coolants, hydraulic oils, surfactants, and fine chemical raw materials.

Storage and Handling

12BG is hygroscopic and susceptible to oxidation. Always use nitrogen dry gas seals to seal storage containers. Store at temperatures not exceeding 40℃.
12BG is a designated hazardous material under the Fire Service Act of Japan and is classified as Category IV—Class III petroleums (water soluble liquids), which corresponds to a Hazardous Rank III substance.

12BG has low volatility and will not self-ignite at room temperature. In the event of fire, effective fire extinguishing agents are powder agents, (alcohol resistant) foam agents, and/or large amounts of water sprayed as mist. 12BG has extremely low toxicity and is a highly safe chemical. When handling, however, wear personal protective equipment such as goggles and protective gloves.

For more information, refer to the Safety Data Sheet (SDS) issued by Mitsubishi Chemical Corporation.

Specifications/Quantities

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Product Specifications

Item C12BG M12BG
Moisture (%) ≤ 1 ≤ 0.5
Purity (%) ≥ 80 ≥ 97
Ester (%) - ≤ 0.3
Acid Value (mgKOH/g) (reference value) ≤ 1 ≤ 0.1

Ester is present in the form of acetic ester.

Available Quantities


C12BG M12BG
Drum 180kg 200kg
Square oil can Prepared upon order 18kg

Inquiries Concerning Products


Mitsubishi Chemical Corporation
C4 Chemicals Dept.

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