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Acetal

Description As a flavor ingredient Synthesis References
Acetal
Acetal structure
CAS No.
105-57-7
Chemical Name:
Acetal
Synonyms
ACETAL;acetaal;Acetale;AT-20GF;NSC 7624;FEMA 2002;Aceton NS;usafdo-45;Delrin 100;Delrin 107
CBNumber:
CB5852662
Molecular Formula:
C6H14O2
Formula Weight:
118.17
MOL File:
105-57-7.mol

Acetal Properties

Melting point:
-100 °C
Boiling point:
103 °C
Density 
0.831 g/mL at 25 °C(lit.)
vapor density 
4.1 (vs air)
vapor pressure 
20 mm Hg ( 20 °C)
refractive index 
n20/D 1.379-1.383(lit.)
FEMA 
2002 | ACETAL
Flash point:
-6 °F
storage temp. 
Refrigerator (+4°C) + Flammables area
solubility 
46g/l
form 
Liquid
color 
Clear colorless
explosive limit
1.6-10.4%(V)
Water Solubility 
46 g/L (25 ºC)
Merck 
14,38
JECFA Number
941
BRN 
1098310
Stability:
Stable. Highly flammable. May form peroxides in storage. Test for peroxides before use. Vapors may form an explosive mixture with air, and may travel to source of ignition and flash back. Vapors may spread along ground and collect in low or confined areas (sewers, basements, tanks).
CAS DataBase Reference
105-57-7(CAS DataBase Reference)
NIST Chemistry Reference
Ethane, 1,1-diethoxy-(105-57-7)
EPA Substance Registry System
Ethane, 1,1-diethoxy-(105-57-7)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  F,Xi
Risk Statements  11-36/38
Safety Statements  9-16-33
RIDADR  UN 1088 3/PG 2
WGK Germany  2
RTECS  AB2800000
Autoignition Temperature 446 °F &_& 446 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29110000
Hazardous Substances Data 105-57-7(Hazardous Substances Data)
Toxicity LD50 orally in rats: 4.57 g/kg (Smyth)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H303 May be harmfulif swallowed Acute toxicity,oral Category 5 P312
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P403+P235 Store in a well-ventilated place. Keep cool.

NFPA 704

Diamond Hazard Value Description
3
1 0
Health   1 Exposure would cause irritation with only minor residual injury (e.g. acetone, sodium bromate, potassium chloride)
Flammability   3 Liquids and solids (including finely divided suspended solids) that can be ignited under almost all ambient temperature conditions . Liquids having a flash point below 22.8 °C (73 °F) and having a boiling point at or above 37.8 °C (100 °F) or having a flash point between 22.8 and 37.8 °C (73 and 100 °F). (e.g. gasoline, acetone)
Instability   0 Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2)
Special  

(NFPA, 2010)

Acetal price More Price(20)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich A902 Acetaldehyde diethyl acetal 99% 105-57-7 5ml $22.1 2018-11-13 Buy
Sigma-Aldrich 55795 Acetaldehyde diethyl acetal analytical standard 105-57-7 1ml $60.2 2018-11-13 Buy
TCI Chemical D0455 Acetal >98.0%(GC) 105-57-7 25mL $14 2018-11-22 Buy
TCI Chemical D0455 Acetal >98.0%(GC) 105-57-7 500mL $59 2018-11-22 Buy
Alfa Aesar A13701 Acetaldehyde diethyl acetal, 99% 105-57-7 100g $24.8 2018-11-13 Buy

Acetal Chemical Properties,Uses,Production

Description

Acetal (full name: Acetaldehyde diethyl acetal/1,1-Diethoxyethane) is a major flavoring component of distilled beverages, especially malt whisky and sherry.
Acetaldehyde diethyl acetal is used as a flavoring agent to provide fruit, nut, rum, and whiskey flavors. It can react with diketene to form ethyl 5-ethoxy-3-oxohexanoate in the presence of titanium chloride. It can also be used to synthesize mixed acetal glycosides via transacetalation.

As a flavor ingredient

Identification:
CAS.No.:  105-57-7  FL.No.:  6.001 FEMA.No.:  2002 NAS.No.:  2002
CoE.No.:  35 EINECS.No.:  203-310-6  JECFA.No.:  941    
   

Synthesis

Acetaldehyde diethyl acetal can be obtained by the reaction between ethyl alcohol and acetaldehyde in the presence of anhydrous calcium chloride.

References

Description

Acetal is a clear, colourless, and extremely flammable liquid with an agreeable odour. The vapour is susceptible to cause flash fire. Acetal is sensitive to light and, on storage, may form peroxides. In fact, it has been reported to be susceptible to autoxidation and should, therefore, be classified as peroxidisable. Acetal is incompatible with strong oxidising agents and acids.

Chemical Properties

clear, colorless liquid

Chemical Properties

Acetal is a clear, colorless, and extremely fl ammable liquid with an agreeable odor. The vapor may cause fl ash fi re. Acetal is sensitive to light and on storage may form peroxides. In fact, it has been reported to be susceptible to autoxidation and should, therefore, be classifi ed as peroxidizable. Acetal is incompatible with strong oxidizing agents and acids.

Chemical Properties

Acetal, an aldehyde, is a clear, volatile liquid with an agreeable odor

Uses

Solvent; in synthetic perfumes such as jasmine; in organic syntheses.

Definition

A type of organic compound formed by addition of an alcohol to an aldehyde. Addition of one alcohol molecule gives a hemiacetal. Further addition yields the full acetal. Similar reactions occur with ketones to produce hemiketals and ketals.

General Description

A clear colorless liquid with a pleasant odor. Boiling point 103-104°C. Flash point -5°F. Density 0.831 g / cm3. Slightly soluble in water. Vapors heavier than air. Moderately toxic and narcotc in high concentrations.

Air & Water Reactions

Highly flammable. Forms heat-sensitive explosive peroxides on contact with air. Slightly soluble in water.

Reactivity Profile

Acetal can react vigorously with oxidizing agents. Stable in base but readily decomposed by dilute acids. Forms heat-sensitive explosive peroxides on contact with air. Old samples have been known to explode when heated due to peroxide formation [Sax, 9th ed., 1996, p. 5].

Health Hazard

May irritate the upper respiratory tract. High concentrations act as a central nervous system depressant. Symptoms of exposure include headache, dizziness, drowsiness, abdominal pain, and nausea.

Health Hazard

Mild irritant to skin and eyes; acute toxicityof low order; narcotic at high concentrations;4-hour exposure to 4000 ppm lethal to mice;the oral LD50 value for mice is 3500 mg/kg.

Health Hazard

Exposures to acetal cause irritation to the eyes, skin, gastrointestinal tract, nausea, vomit- ing, and diarrhea. In high concentrations, acetal produces narcotic effects in workers.

Fire Hazard

Highly flammable; flash point (closed cup) -21°C (-6°F); vapor density 4.1 (air = 1), vapor heavier than air and can travel some distance to a source of ignition and flash back; autoignition temperature 230°C (446°F); vapor forms explosive mixtures with air, LEL and UEL values are 1.6% and 10.4% by volume in air, respectively (DOT Label: Flammable Liquid, UN 1088). .

Industrial uses

Acetal homopolymer resins have high tensilestrength, stiffness, resilience, fatigue endurance,and moderate toughness under repeatedimpact. Some tough grades can deliver up to 7times greater toughness than unmodified acetalin Izod impact tests and up to 30 times greatertoughness as measured by Gardner impact tests.
Automotive applications of acetal homopolymerresins include fuel-system and seat-beltcomponents, steering columns, window-supportbrackets, and handles. Typical plumbingapplications that have replaced brass or zinccomponents are showerheads, ball cocks, faucetcartridges, and various fittings. Consumer itemsinclude quality toys, garden sprayers, stereocassette parts, butane lighter bodies, zippers,and telephone components. Industrial applicationsof acetal homopolymer include couplings,pump impellers, conveyor plates, gears, sprockets,and springs.

Safety Profile

Moderately toxic by ingestion, inhalation, and intraperitoneal routes.A skin and eye irritant. A narcotic. Dangerous fire hazard when exposed to heat or flame; can react vigorously with oxidizing materials. Forms heat-sensitive explosive peroxides on contact with air. when heated to decomposition it emits acrid smoke and fumes. See also ETHERS and ALDEHYDES.

Potential Exposure

Used as a solvent; in synthetic perfumes, such as jasmine, cosmetics, flavors; in organic synthesis.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. If this chemical contacts the skin, remove contaminated clothing and wash with soap immediately. When this chemical hasbeen swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. If this chemical has been inhaled, remove from exposure, and transfer promptly to a medical facility.

Shipping

UN1088 Acetal, Hazard Class: 3; Labels: 3-Flammable liquid. UN1988 Aldehydes, flammable, toxic, n.o.s., Hazard Class: 3; Labels: 3-Flammable liquid, 6.1-Poisonous materials, Technical Name Required

Purification Methods

Dry acetal over Na to remove alcohols and H2O, and to polymerise aldehydes, then fractionally distil. Or, treat it with alkaline H2O2 at 40-45o to remove aldehydes, then saturate with NaCl, separate, dry with K2CO3 and distil it from Na [Vogel J Chem Soc 616 1948]. [Beilstein 1 IV 3103.]

Incompatibilities

Aldehydes are frequently involved in self-condensation or polymerization reactions. These reactions are exothermic; they are often catalyzed by acid. Aldehydes are readily oxidized to give carboxylic acids. Flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). The addition of stabilizers (antioxidants) to shipments of aldehydes retards autoxidation. Presumed to form explosive peroxides on contact with air and light. May accumulate static electrical charges, and may cause ignition of its vapors.

Waste Disposal

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.

Acetal Preparation Products And Raw materials

Raw materials

Preparation Products


Acetal Suppliers

Global( 166)Suppliers
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View Lastest Price from Acetal manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-17 Acetal
105-57-7
US $1.00 / kg 1 g 99% 100KG career henan chemical co

Acetal Spectrum


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