(^ +)-2-метил-2 ,4-пентандиол химические свойства, назначение, производство
Химические свойства
Hexylene Glycol is an oily colorless liquid with a mild sweet odor. It is an oxygenated solvent derived from acetone which has two alcohol functions. It has a low evaporation rate and it is completely miscible with water.
Использование
(^+)-2-Methyl-2,4-pentanediol is used to control the flow properties of industrial products such as paints, coatings, cleansers, solvents, and hydraulic fluids. It acts as a thickening agent in cosmetic products. It serves as a coupling agent and an additive to hydraulic fluids, inks and cement. It is also employed as a blood volume expander. Further, it is used as a solvent for cleaning and colorant products. In addition to this, it is used in laboratory studies as a precipitant and cryoprotectant in protein crystallography.
Методы производства
2-Methyl-2,4-pentanediol is prepared commercially by the
catalytic hydrogenation of diacetone alcohol . It is used
as a chemical intermediate, a selective solvent in petroleum
refining, a component of hydraulic fluids, a solvent for inks,
and as an additive for cement .
Industrial exposure is likely to be from direct contact or
from inhalation, particularly if the material is heated.
Определение
ChEBI: A glycol in which the two hydroxy groups are at positions 2 and 4 of 2-methylpentane (isopentane).
Общее описание
Oily colorless liquid with a mild sweet odor. Floats and mixes slowly with water.
Реакции воздуха и воды
Hygroscopic. Water soluble [Hawley]
Профиль реактивности
2-Methyl-2,4-pentanediol is incompatible with the following: Strong oxidizers, strong acids [Note: Hygroscopic (i.e., absorbs moisture from the air).] .
Опасность
Toxic by ingestion and inhalation; irritant to
skin, eyes, and mucous membranes. Combustible.
Угроза здоровью
Irritation of eyes, nose and throat; headache, dizziness, and nausea.
Химическая реактивность
Reactivity with Water No reaction; Reactivity with Common Materials: Can catch fire when in contact with porous materials such as wood, asbestos, cloth, soil, or rusty metals; Stability During Transport: Stable at ordinary temperatures, however when heated this material can decompose to nitrogen and ammonia gases. The decomposition is not generally hazardous unless it occurs in confined spaces; Neutralizing Agents for Acids and Caustics: Flush with water and neutralize the resulting solution with calcium hypochlorite; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
Методы очистки
Dry the diol with Na2SO4, then CaH2 and fractionally distil it under reduced pressure through a packed column, taking precautions to avoid absorption of water. [Beilstein 1 IV 2565.]
(^ +)-2-метил-2 ,4-пентандиол препаратная продукция и сырье
сырьё
препарат
2,5-диметил-2,5-ди(трет-бутилперокси)гексан
6-Хлор-1-гексанол
ГЕКСАМЕТИЛЕНДИАМИН
1,6-дибромгексана
1-амино-4-гидрокси-2-[(6-гидроксигексил)окси]антрахинон
2-ИЗОПРОПОКС-4,4,6-ТРИМЕТИЛ-[1,3,2]ДИОКСАБОРИНАН
4-метил-1,3-пентадиен
4-метил-4-пентен-2-ол
3-(3-гидрокси-1,3-диметилбутокси)пропаннитрил
4,4,6-триметил-2-фенил-1,3-диоксан
2,2,4-триметил-7-(1,1,3,3-тетраметилбутил)хроман-6-ол
5,6-DIHYDRO-4,4,6-TRIMETHYL-2-VINYL-1,3(4H)-OXAZINE
2-(2-Methoxyphenyl)-4,4,6-trimethyl-1,3,2-dioxaborinane