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2,2-Dimethyl-1,3-propanediol

CAS No.
126-30-7
Chemical Name:
2,2-Dimethyl-1,3-propanediol
Synonyms
NEOPENTYL GLYCOL;2,2-Dimethylpropane-1,3-diol;1,3-Dihydroxy-2,2-dimethylpropane;NEOPENTYL GLYCO;Neol;NPG Glycol;2,2-Dimethyl-1;NEOPENTYLENE GLYCOL;2,2-BIS(HYDROXYMETHYL)PROPANE;NEOL(R)
CBNumber:
CB9111688
Molecular Formula:
C5H12O2
Molecular Weight:
104.15
MDL Number:
MFCD00004685
MOL File:
126-30-7.mol
MSDS File:
SDS
Last updated:2023-12-27 17:40:21

2,2-Dimethyl-1,3-propanediol Properties

Melting point 126-128 °C
Boiling point 208 °C
Density 1.06
vapor density 3.6 (vs air)
vapor pressure <0.8 mm Hg ( 20 °C)
refractive index 1.4406 (estimate)
Flash point 107 °C
storage temp. Inert atmosphere,Room Temperature
solubility 830g/l
pka 14.57±0.10(Predicted)
form Crystalline Chunks
color White
explosive limit 1.34%, 149°F
Water Solubility 830 g/L (20 ºC)
Sensitive Hygroscopic
Merck 14,6458
BRN 605291
Stability Stable. Incompatible with strong oxidizing agents, acetic anhydride, acid chlorides, moisture. Combustible.
LogP -0.15 at 25℃
Indirect Additives used in Food Contact Substances NEOPENTYL GLYCOL
FDA 21 CFR 175.105; 175.320; 177.1680
CAS DataBase Reference 126-30-7(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII QI80HXD6S5
NIST Chemistry Reference 1,3-Propanediol, 2,2-dimethyl-(126-30-7)
EPA Substance Registry System Neopentyl glycol (126-30-7)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS05
Signal word  Danger
Hazard statements  H318
Precautionary statements  P280-P305+P351+P338
Hazard Codes  Xi
Risk Statements  36/37/38-36-41
Safety Statements  26-36-39
WGK Germany  1
RTECS  TY5775000
3
Autoignition Temperature 750 °F
TSCA  Yes
HS Code  29053990
Toxicity rat,LCLo,inhalation,39000ppm/6H (39000ppm),Kodak Company Reports. Vol. 21MAY1971,
NFPA 704
1
1 0

2,2-Dimethyl-1,3-propanediol price More Price(35)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 538256 2,2-Dimethyl-1,3-propanediol 99% 126-30-7 25g $17.04 2024-03-01 Buy
Sigma-Aldrich 538256 2,2-Dimethyl-1,3-propanediol 99% 126-30-7 3kg $95.8 2024-03-01 Buy
Sigma-Aldrich 52488 2,2-Dimethyl-1,3-propanediol analytical standard 126-30-7 100MG $69 2022-05-15 Buy
TCI Chemical D0791 2,2-Dimethyl-1,3-propanediol >98.0%(GC) 126-30-7 25g $18 2024-03-01 Buy
TCI Chemical D0791 2,2-Dimethyl-1,3-propanediol >98.0%(GC) 126-30-7 500g $30 2024-03-01 Buy
Product number Packaging Price Buy
538256 25g $17.04 Buy
538256 3kg $95.8 Buy
52488 100MG $69 Buy
D0791 25g $18 Buy
D0791 500g $30 Buy

2,2-Dimethyl-1,3-propanediol Chemical Properties,Uses,Production

Chemical Structure

The chemical formula for Neopentyl glycol (NPG) is C5H12O2, and it is a propane-1,3-diol carrying two methyl groups at position 2.Neopentyl glycol is soluble in water, benzene, chloroform, and very soluble in ethanol and diethyl ether. Neopentylglycol (NPG) is a unique polyalcohol offering superior performance advantages in many end-use applications due to its high chemical and thermal stability. It is a unique diol offering superior performance advantages in many end-use applications. These advantages are derived from its chemical structure. The location of the hydroxyl groups on primary carbon atoms allows rapid esterification. Additionally, the two methyl groups, instead of the usual two hydrogen atoms, on the alpha carbon atom are responsible for the high chemical and thermal stability of Neopentylglycol and its derivatives.

Application

Neopentyl glycol is used in the synthesis of polyesters, paints, lubricants, and plasticizers. When used in the manufacture of polyesters, it enhances the stability of the product towards heat, light, and water. By esterification reaction with fatty or carboxylic acids, synthetic lubricating esters with reduced potential for oxidation or hydrolysis, compared to natural esters, can be produced. NPG is used primarily in base resins for coatings. In powder coating formulations, Neopentylglycol offers the additional advantage of providing small differences between the glass transition temperature and melting point. Important areas of application include general metal, appliance, metal furniture, automotive and machinery coatings. Important uses are also found in hydraulic fluids, synthetic lubricant oils, greases, metalworking fluids and aircraft engine lubricants. Other outlets include textiles, pharmaceuticals, pesticides, plasticizers and petroleum.
High quality NPG is shipped as flake, molten and slurry. The high-quality NPG is the component in polyester resins for industrial coatings and fiberglass-reinforced plastics applications, and most polyester resin formulations contain NPG as the sole glycol component, or it is used in conjunction with a modifying glycol to achieve desired properties. NPG is also used in polyester polyols for polyurethane coatings for the automotive, industrial maintenance, transportation, and aerospace markets.

Chemical Properties

white solid

Uses

2,2-Dimethyl-1,3-propanediol may be used in the synthesis of:

  • 2,2-dimethyl-1,3-propanediol cyclic phosphorochloridate
  • 2,2-dimethyl-1,3-propanediol cyclic phenylphosphonate
  • [1′,3′-(2′,2′-dimethylpropylene)]-2-iodo-3-octyl-5-thienylboronate
  • cyclic carbonate
  • 2,2-dimethyl-1,3-propanediol bis(cyclic-2,2-dimethyltrimethylene phosphite)

Uses

In the manufacture of plasticizers, polyesters, as modifier of alkyd resins.

Uses

NPG Glycol is used in the synthesis of tetraphenylporphyrins. Also used in the synthesis of Bryostatin 2, a protein kinase modulator.

Preparation

3-hydroxy-2,2-dimethylpropanal) could be reduced to neopentyl glyco. Hydroxypivaldehyde can be reduced either by a crossed Cannizzaro reaction with equimolar amounts of formaldehyde and a base, or by catalytic hydrogenation. If inorganic bases such as potassium carbonate or sodium hydroxide are used as catalysts, satisfactory yields (ca. 80 %) of neopentyl glycol can be obtained only with an excess of isobutyraldehyde. Tertiary amines are also used as catalysts for the aldol addition. Catalytic transfer hydrogenation of the aldol intermediate is also possible using formate salts as hydrogen source. After fractional distillation a very good yield of high-purity neopentyl glycol is obtained.

Definition

ChEBI: Neopentyl glycol is a propane-1,3-diol carrying two methyl groups at position 2.

General Description

White crystalline solid. Melting point 130°C.

Air & Water Reactions

Soluble in water.

Reactivity Profile

2,2-Dimethyl-1,3-propanediol may generate toxic gases in combination of with alkali metals, nitrides, and strong reducing agents. Reacts with inorganic acids and carboxylic acids to form esters plus water. Converted to aldehydes or acids by oxidizing agents. May initiate the polymerization of isocyanates and epoxides.
In addition to the reactions typical of primary alcohols, such as ester, ether, and carbamate (urethane) formation, 1,3-diols give six-membered cyclic derivatives with carbonyl compounds, carbonates, phosphites, sulfifites, and borates.

Health Hazard

May be harmful by ingestion or skin absorption. Causes eye and skin irritation. Material is irritating to mucous membrane and upper respiratory tract. INHALATION: Call for medical aid. Remove to fresh air. If breathing has stopped, give artificial respiration. If breathing is difficult, give oxygen.

Fire Hazard

Special Hazards of Combustion Products: Emits toxic fumes under fire condition.

Flammability and Explosibility

Non flammable

Solubility in water

Neopentyl glycol is soluble in water, alcohols, and ketones, moderately soluble in hot aromatic solvents, such as benzene and toluene, and relatively insoluble in aliphatic and cycloaliphatic solvents.

storage

During storage, higher temperatures and stacking pressures can lead to caking of the lower stack layers. As a hygroscopic material, 2,2-Dimethyl-1,3-propanediol must be stored dry. The product is also sold as 90 % aqueous solution, which should be stored at 55 – 60 ℃ to avoid precipitation, and as a 100 % melt.

Purification Methods

Crystallise the diol from *benzene or acetone/water (1:1). [Beilstein 1 IV 2551.]

50-00-0
78-84-2
126-30-7
Synthesis of 2,2-Dimethyl-1,3-propanediol from Formaldehyde and Isobutyraldehyde
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Related articles

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  • The chemical formula for Neopentyl glycol is C5H12O2, and it is a propane-1,3-diol carrying two methyl groups at position 2. T....
  • Mar 2,2020

View Lastest Price from 2,2-Dimethyl-1,3-propanediol manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,2-Dimethyl-1,3-propanediol pictures 2023-12-27 2,2-Dimethyl-1,3-propanediol
126-30-7
US $0.00 / kg 1kg 99% 1000000 Hebei Jingbo New Material Technology Co., Ltd
2,2-Dimethyl-1,3-propanediol pictures 2023-12-24 2,2-Dimethyl-1,3-propanediol
126-30-7
US $50.00-1.00 / KG 1KG 99% g-kg-tons, free sample is available Henan Fengda Chemical Co., Ltd
2,2-Dimethyl-1,3-propanediol pictures 2023-08-14 2,2-Dimethyl-1,3-propanediol
126-30-7
US $0.00-0.00 / kg 1kg 0.99 50000kg Hebei Yibangte Import and Export Co. , Ltd.
1,3-propanediol,2,2-dimethyl- 2,2-Dimethyl-1,3-dihydroxypropane 2,2-DIMETHYL-1,3-PROPANEDIOL (NPG) 2,2-Dimethyl-1,3 propandiol 2,2-dimethyl-1,3-propanediol (Neopentyl Glycol) 2,2-Dimethylpropan-1,3-diol NEOPENTYL GLYCOL pure Neopentylglycol, NPG Glycol 2,2-Dimethyl-1,3-propanediol,99% 2,2-Dimethyl-1,3-propanediol,97% 2,2-DIMETHYL-1,3-PROPANEDIOL 99.5+% neopentyl glycol(2,2-dimethyl-1,3-propanedil) 2,2-Dimethyl-1,3-propanediol,NPG Glycol, Neopentylglycol Neopentyl Glycol (Slurry and Flake) 2,2-DiMethyl-1,3-propanediol, 99% 25GR 2,2-DiMethyl-1,3-propanediol, 99% 500GR 2,2-Bis(hydroxymethyl)propane 2,2-Dihydroxy-2,2-dimethylpropane Neopentyl Glycol 2,2-DIMETHYL-1,3-PROPANEDIOL FOR SYNTHES Neopentyl glycol (NPG) 2,2-DiMethyl-1,3-propanediol 99% 2,2-DiMethyl-1,3-propanediol, 99.5%, 99.5% 2,2-dimethyl-3-propanediol 2,2-dimethyltrimethyleneglycol 3-Propanediol,2,2-dimethyl-1 Dimethylolpropane Hydroxypivalyl alcohol hydroxypivalylalcohol Neopentanediol DIMETHYLTRIMETHYLENE GLYCOL NEOL(R) 2,2-DIHYDROXY-2,2-DIMETHYLPROPANE 2,2-DIMETHYL-1,3-PROPANEDIOL Neopentylglycol flakes 2,2-Dimethyl-1,3-propanediol(NPG Glycol) 2,2-Dimethyl-1,3-propanediol, 99.5%, for synthesis 2,2-Dimethyl-1,3-propanediol, 99%, for synthesis 2,2-Dimethyl-1,3-propanediol > -1,3-propanedioL 2,2-Dimethyl-1,3-propanediol ISO 9001:2015 REACH Neopentyl glycol CAS126-30-7 Neopentyl Glycol Solid C5h12o2 126-30-7 Npg Neopentyl Glycol 1,3-Dihydroxy-2,2-dimethylpropane NEOPENTYL GLYCO 2,2-Dimethylpropane-1,3-diol Neol NPG Glycol NEOPENTYLENE GLYCOL NEOPENTYL GLYCOL 2,2-BIS(HYDROXYMETHYL)PROPANE 2,2-Dimethyl-1 22,2-Dimethyl-1,3-propanediol 126-30-7 CH32CCH2OH2 126307 HOCD2CCD32CD2OH Polyols Oxygen Compounds Organic Building Blocks