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398039

1,2-propanediol

ACS reagent grade, ≥99.5%, liquid

Synonyme(s) :

Propylène glycol

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A propos de cet article

Formule linéaire :
CH3CH(OH)CH2OH
Numéro CAS:
57-55-6
Poids moléculaire :
76.09
NACRES:
NA.21
PubChem Substance ID:
24864713
UNSPSC Code:
12352100
EC Number:
200-338-0
MDL number:
MFCD00064272
Beilstein/REAXYS Number:
1340498
Assay:
≥99.5%
Form:
(liquid or viscous liquid)
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Nom du produit

1,2-propanediol, ACS reagent, ≥99.5%

grade

ACS reagent

Quality Segment

200

vapor density

2.62 (vs air)

vapor pressure

0.08 mmHg ( 20 °C)

assay

≥99.5%

form

(liquid or viscous liquid)

autoignition temp.

779 °F

expl. lim.

12.5 %

impurities

≤0.0005 meq/g Titr. acid, ≤0.2% water

ign. residue

≤0.005%

color

APHA: ≤10

refractive index

n20/D 1.432 (lit.)

bp

187 °C (lit.)

mp

−60 °C (lit.)

density

1.036 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤1 ppm

functional group

hydroxyl

SMILES string

CC(O)CO

InChI

1S/C3H8O2/c1-3(5)2-4/h3-5H,2H2,1H3

InChI key

DNIAPMSPPWPWGF-UHFFFAOYSA-N

General description

1,2-Propanediol, a 1,2-alkanediol is an industrially important chemical. Due to its increasing demand many green methods have been proposed for its synthesis mainly using the inexpensive glycerol as the starting material. It is a raw material for the synthesis of intermediates, building blocks and polymers.[1]

Application

1,2-Propanediol may be used in the following processes:
  • Green synthesis of propylene carbonate.
  • Production of lactic acid by green catalytic oxidation.
  • Propanal generation by catalytic dehydration.

Other Notes

The article number 398039-4X2L will be discontinued. Please order the single bottle 398039-2L which is physically identical with the same exact specifications.

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Classe de stockage

10 - Combustible liquids

wgk

WGK 1

flash_point_f

219.2 °F - closed cup

flash_point_c

104 °C - closed cup

ppe

Eyeshields, Gloves

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Certificats d'analyse (COA)

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Questions

1–4 of 4 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  3. What is the concentration of the stock bottle?

    1 answer

    1. This product is supplied as a neat or pure liquid with a literature density of 1.036 g/mL and a molecular weight of 76.09 g/mol. The minimum purity is 99.50 %, thus the molarity will vary slightly from lot to lot. The molarity can range from 13.5 M (99.50 %) to 13.6 M (100%).

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  4. Il propandiolo in soluzione al 30% favorisce o inibisce la crescita batterica in particolare di Pseudomonas aeruginosa? Grazie

    1 answer

    1. This product has not been tested for growth promotion or inhibition at any concentration. These properties would have to be determined by the end user. See the link below to a publication that may be helpful.
      https://biotechnologyforbiofuels.biomedcentral.com/articles/10.1186/s13068-021-02067-w

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