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  • 1,3-Dimercaptopropane
  • 1,3-Dimercaptopropane
  • 1,3-Dimercaptopropane

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1,3-Dimercaptopropane

1,3-Dimercaptopropane

Basic Information

CAS No.: 109-80-8
Molecular Formula: C3H8S2
Molecular weight: 108.23

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Product Details

1, 3-dimercaptopropane is usually a colorless transparent liquid at room temperature. However, due to its easy oxidation and other reasons, it may be slightly yellow after long-term storage.

It is a liquid state at room temperature and atmospheric pressure, with a certain fluidity, its density is slightly larger than water, slightly soluble in water, can be mixed in ethanol, ether, benzene, chloroform and other organic solvents.


Chemical Properties
PropertyValue

Melting point

-79 °C (lit.)

Boiling point

169 °C (lit.)

Density

1.078 g/mL at 25 °C (lit.)

Vapor density

>1 (vs air)

Vapor pressure

5 mm Hg ( 37.7 °C)

Refractive index

n20/D1.539(lit.)

FEMA

3588 | 1,3-PROPANEDITHIOL

Fp

138 °F

Storage temp.

Store below +30°C.

Form

Liquid

Pka

9.86±0.10(Predicted)

Color

Clear light yellow

Specific Gravity

1.078

Odor

at 0.10 % in propylene glycol. meaty sulfurous

Odor Type

meaty

Biological source

synthetic

Water Solubility

<0.1 g/100 mL at 21 ºC

JECFA Number

535

Merck

14,7801

BRN

1071197

Stability

Stable. Incompatible with oxidizing agents, bases, reducing agents, alkali metals. Store cool.

LogP

1.70

CAS DataBase Reference

109-80-8(CAS DataBase Reference)

NIST Chemistry Reference

1,3-Propanedithiol(109-80-8)

EPA Substance Registry System

1,3-Propanedithiol (109-80-8)


Safety Information
PropertyValue
Hazard symbolXi
Hazard class codes36/37/38
Safety descriptions26-24/25
UN dangerous goods number3336
WGK Germany3
RTECS numberTZ2585500
F13
TSCATSCA listed
Hazard class6.1
Packing groupIII
HS code29309070
Storage class3 - Flammable liquids
Hazard class (category)Acute toxicity, Category 3, Oral
Flammable liquid, Category 3
Skin irritation, Category 2
ToxicityLD50 orally in Rabbit: >50 - 300 mg/kg


Product Usage

1,3-Dimercaptopropane is a high-purity organosulfur compound characterized by its dual thiol groups, making it an exceptional cross-linking agent and building block in organic synthesis. Its primary application is in the pharmaceutical industry as a critical intermediate for synthesizing sulfur-containing drugs and as a protecting group for carbonyl compounds (forming dithianes). In the polymer and electronics sectors, it is used to manufacture high-refractive-index optical resins and specialty adhesives, prized for their thermal stability and chemical resistance. Furthermore, it serves as a potent chelating agent in water treatment and analytical chemistry, effectively sequestering heavy metal ions. It is also employed as a specialized flavor and fragrance intermediate, contributing to the development of savory aromatic profiles.

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