Butyraldehyde(CAS#123-72-8)

Chemical Property:

Molecular Formula	C4H8O
Molar Mass	72.11
Density	0.817
Melting Point	-96 °C
Boling Point	75°C(lit.)
Flash Point	12°F
JECFA Number	86
Water Solubility	7.1 g/100 mL (25 ºC)
Solubility	water: soluble50g/L at 20°C
Vapor Presure	90 mm Hg ( 20 °C)
Vapor Density	2.5 (vs air)
Appearance	Liquid
Color	Clear colorless
Odor	Pungent aldehyde; pungent and intense.
Exposure Limit	No exposure limit is set for n-butyraldehyde.
Merck	14,1591
BRN	506061
PH	6-7 (71g/l, H2O, 20℃)
Storage Condition	2-8°C
Stability	Stable. Incompatible with oxidizing agents, strong bases, strong reducing agents, strong acids. Highly flammable.
Sensitive	Air Sensitive
Explosive Limit	1.7-11.1%(V)
Refractive Index	n20/D 1.380(lit.)
Physical and Chemical Properties	Character: colorless, transparent, flammable liquid, with asphyxiating aldehyde flavor.
Use	Main use; Used as resin, plastic plasticizer, vulcanization accelerator, insecticide and other intermediates, can also be used in organic synthesis, manufacturing perfume raw materials

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Product Detail

Product Tags

Hazard Symbols	F – Flammable
Risk Codes	R11 – Highly Flammable
Safety Description	S9 – Keep container in a well-ventilated place. S29 – Do not empty into drains. S33 – Take precautionary measures against static discharges. S16 – Keep away from sources of ignition.
UN IDs	UN 1129 3/PG 2
WGK Germany	1
RTECS	ES2275000
FLUKA BRAND F CODES	13-23
TSCA	Yes
HS Code	2912 19 00
Hazard Class	3
Packing Group	II
Toxicity	Single-dose LD50 orally in rats: 5.89 g/kg (Smyth)

Introduction

chemical properties

Colorless transparent flammable liquid with asphyxiating aldehyde smell. Slightly soluble in water. Miscible with ethanol, ether, ethyl acetate, acetone, toluene, a variety of other organic solvents and oils.

Use

Used in organic synthesis and a raw material for making spices

Use

GB 2760-96 specifies edible spices that are allowed to be used. Mainly used to prepare bananas, caramel and other fruit flavors.

Use

butyraldehyde is an important intermediate. n-butanol can be produced by hydrogenation of n-butanal; 2-ethylhexanol can be produced by condensation dehydration and then hydrogenation, and n-butanol and 2-ethylhexanol are the main raw materials of plasticizers. n-butyric acid can be produced by oxidation of n-butyric acid; trimethylolpropane can be produced by condensation with formaldehyde, which is a plasticizer for synthesis of alkyd resin and a raw material for air drying oil; condensation with phenol to produce oil-soluble resin; condensation with urea can produce alcohol-soluble resin; products condensed with polyvinyl alcohol, butylamine, thiourea, diphenylguanidine or methyl carbamate are raw materials and, condensation with various alcohols is used as a solvent for celluloid, resin, rubber and pharmaceutical products; the pharmaceutical industry is used to make “Mianerton”, “pyrimethamine”, and amylamide.

Use

Rubber glue, rubber accelerator, synthetic resin ester, manufacturing butyric acid, etc. Its hexane solution is a reagent for determining ozone. Used as a solvent for lipids, also used in the preparation of flavors and fragrances and as a preservative.

Production method

at present, the production methods of butyraldehyde adopt the following methods: 1. propylene carbonyl synthesis method propylene and synthesis gas carry out carbonyl synthesis reaction in the presence of Co or Rh catalyst to generate n-butyraldehyde and isobutyraldehyde. Due to the different catalysts and process conditions used, it can be divided into high-pressure carbonyl synthesis with cobalt carbonyl as catalyst and low-pressure carbonyl synthesis with rhodium carbonyl phosphine complex as catalyst. The high pressure method has high reaction pressure and many by-products, thus increasing the production cost. The low-pressure carbonyl synthesis method has low reaction pressure, positive isomer ratio of 8-10:1, less by-products, high conversion rate, low raw materials, low power consumption, simple equipment, short process, showing excellent economic effects and rapid development. 2. Acetaldehyde condensation method. 3. Butanol oxidative dehydrogenation method uses silver as a catalyst, and butanol is oxidized by air in one step, and then the reactants are condensed, separated, and rectified to obtain the finished product.

Production method

It is obtained by dry distillation of calcium butyrate and calcium formate.

The vapor is obtained by dehydrogenation of the catalyst.