Butyraldehyde Chemical Properties
- Melting point:
- -96 °C
- Boiling point:
- 75 °C(lit.)
- vapor density
- 2.5 (vs air)
- vapor pressure
- 90 mm Hg ( 20 °C)
- refractive index
- 2219 | BUTYRALDEHYDE
- Flash point:
- 12 °F
- storage temp.
- Flammables area
- water: soluble50g/L at 20°C
- Clear colorless
- Pungent aldehyde; pungent and intense.
- 6-7 (71g/l, H2O, 20℃)
- PH Range
- Odor Threshold
- explosive limit
- Water Solubility
- 7.1 g/100 mL (25 ºC)
- Air Sensitive
- JECFA Number
- Exposure limits
- No exposure limit is set for n-butyraldehyde.
- Stable. Incompatible with oxidizing agents, strong bases, strong reducing agents, strong acids. Highly flammable.
- CAS DataBase Reference
- 123-72-8(CAS DataBase Reference)
- NIST Chemistry Reference
- EPA Substance Registry System
- Butyraldehyde (123-72-8)
- Hazard Codes
- Risk Statements
- Safety Statements
- UN 1129 3/PG 2
- WGK Germany
- Autoignition Temperature
- 390 °F
- HS Code
- 2912 19 00
- Hazardous Substances Data
- 123-72-8(Hazardous Substances Data)
- Single-dose LD50 orally in rats: 5.89 g/kg (Smyth)
Butyraldehyde Usage And Synthesis
Butanal (N-butyraldehyde) is an organic compound which is the aldehyde derivative of butane. It appeases as a clear liquid. Butyraldehye is used mainly as an intermediate in the production of synthetic resins, rubber vulcanization accelerators, solvents, and plasticizers. It is also an intermediate for the manufacture of pharmaceuticals, crop protection products, pesticides, antioxidants, tanning auxiliaries, and perfumes. Butyraldehyde has a characteristic pungent odor and it is used as a food additive.
 George A. Burdock, Encyclopedia of Food and Color Additives, Volume 1, 2000
 Sunggye Lee, Methane and Its Derivatives, 1997
colourless liquid with a very unpleasant smell
Butyraldehyde is a highly flammable, colorless liquid with a pungent odor.
Butyraldehyde has a characteristic pungent odor.
Reported found in the essential oils from flowers, fruits, leaves or bark of Monarda fistulosa L., Litsea cubeba, Bulgarian clary sage, cajeput, Eucalyptus cinerea, E. globules, and others, as well as in apple and strawberry aromas. Also reported found in fresh apple, pears, carrots, peas, soybean, butter, milk, black tea, roast chicken, peanuts, loganberry, honey, white wine and hog plums (Spondias mombins L.).
n-Butyraldehyde is used to make rubberaccelerators, synthetic resins, and plasticizers;and as a solvent.
Chiefly in the manufacture of rubber accelerators, synthetic resins, solvents, plasticizers.
ChEBI: A member of the class of butanals that consists of propane bearing a formyl substituent at the 1-position. The parent of the class of butanals.
By dry distillation of calcium butyrate and calcium formate.
Aroma threshold values
Detection: 19 to 37 ppb; recognition: 11 to 27 ppb
Taste threshold values
Taste characteristics at 5 ppm: musty, fusel, fermented, bready and yeasty with a malty nuance.
A clear liquid with a pungent odor. Flash point 20°F. Boiling point 75.7°F (Hawley's). Less dense than water and insoluble in water. Vapors heavier than air.
Air & Water Reactions
Highly flammable. Insoluble in water.
A colorless liquid, Butyraldehyde can react with oxidizing materials. In contact with strong acids or bases Butyraldehyde will undergo an exothermic condensation reaction. The dry aldehyde may undergo some polymerization reaction. Reacts vigorously with chlorosulfonic acid, nitric acid, sulfuric acid (oleum). [Sax, 9th ed., 1996, p. 607].
Flammable, dangerous fire risk.
n-Butyraldehyde is a mild skin and eye irritant.The liquid in 100% pure form producedmoderate irritation on guinea pig skin. Theirritation resulting from 20 mg in 24 hours on rabbit eye was moderate. A higher dosecould produce severe irritation.
Toxicity of n-butyraldehyde is very low.The effect is primarily narcotic. No toxiceffect, however, was observed in mice from 2-hour exposure at a concentration of 44.6 g/m3.At a higher concentration, 174 g/m3 for30 minutes, it exhibited a general anestheticeffect on rats. Subcutaneous administrationof a high dose, >3 g/kg, produced the sameeffect, affecting the kidney and bladder.
Inhalation will cause irritation and possibly nausea, vomiting, headache, and loss of consciousness. Contact with eyes causes burns. Skin contact may be irritating.
Behavior in Fire: Vapors are heavier than air and may travel considerable distance to a source of ignition and flash back. Fires are difficult to control due to ease of reignition.
Reactivity with Water No reaction; Reactivity with Common Materials: No reactions; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: May occur in the presence of heat, acids or alkalis; Inhibitor of Polymerization: Not pertinent.
Moderately toxic by ingestion, inhalation, skin contact, intraperitoneal, and subcutaneous routes. Severe skin and eye irritant. Human immunologcal effects by inhalation: delayed hypersensitivity. See also ALDEHYDES. Highly flammable liquid. To fight fire, use foam, CO2, dry chemical. Incompatible with oxidzing materials. Reacts vigorously with chlorosulfonic acid, HNO3, oleum, H2SO4. When heated to decomposition it emits acrid smoke and fumes
Although butyraldehyde interacts with DNA, no experimental studies of its carcinogenic potency were found.
UN1129 Butyraldehyde, Hazard Class: 3; Labels: 3—Flammable liquid
May form explosive mixture with air. Butyraldehyde can presumably form explosive peroxides, and may polymerize due to heat or contact with acids or alkalis. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, caustics, ammonia, aliphatic amines; alkanolamines, aromatic amines. May accumulate static electrical charges, and may cause ignition of its vapors. Possible self-reaction in air; undergoes rapid oxidation to
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.
Butyraldehyde Preparation Products And Raw materials
- Ethyl 5-bromovalerate
- 2-BROMOHEXANOYL BROMIDE
- Ethyl 2-bromovalerate
- METHYL 4-FLUOROBENZOYLACETATE
- Heptafluorobutyric anhydride
- 3-(2-FLUORO-PHENYL)-3-OXO-PROPIONIC ACID ETHYL ESTER
- Ethyl 2-bromoheptanoate
- DL-Ethyl 2-bromobutyrate
- Ethyl 4-bromobutyrate
- Ethyl 4,4,4-trifluoroacetoacetate
- Ethyl 2-bromohexanoate
- METHYL HEPTAFLUOROBUTYRATE
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