1,3-Propanediol CAS#504-63-2

Core Feedstock for PTT Manufacturing
1,3-Propanediol (PDO) is an indispensable raw material to produce polytrimethylene terephthalate (PTT), a new-generation polyester fiber.
Outstanding Chemical Stability
PTT polymerized from PDO retains the exceptional chemical stability of traditional PET, granting consistent durability and long-lasting service performance.
Superior Elastic Recovery
PTT fabrics boast remarkable stretch and outstanding shape retention, greatly elevating the comprehensive quality of finished textiles.
Stain & Soil Resistance
PTT exhibits robust resistance against stains and outdoor contaminants, rendering it ideal for premium textile end uses.

1,3-Propanediol (PDO) is primarily used for the synthesis of polytrimethylene terephthalate (PTT), a high-performance new-generation polyester. Combining the superior chemical stability of PET with exceptional resilience and stain resistance, PTT boasts versatile properties and promising application prospects in the textile industry.

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1,3-Propanediol Chemical Properties

Melting point	-27 °C (lit.)
Boiling point	214 °C/760 mmHg (lit.)
Density	1.053 g/mL at 25 °C (lit.)
Vapor pressure	0.8 mm Hg ( 20 °C)
Refractive index	n20/D 1.440(lit.)
FEMA	4753 \| 1,3-PROPANEDIOL
Fp	>230 °F
Storage temp	Store below +30°C.
Solubility	H2O: soluble
Pka	14.46±0.10(Predicted)
Form	Oily Liquid
Color	Clear
PH	4.5-7.0 (100g/l, H2O, 20℃)
Explosive limit	2.5%(V)
Water Solubility	100 g/L
Merck	14,9714
BRN	969155
Dielectric constant	35.0（20℃）
InChIKey	YPFDHNVEDLHUCE-UHFFFAOYSA-N
LogP	-0.71 at 20℃
CAS DataBase Reference	504-63-2(CAS DataBase Reference)
NIST Chemistry Reference	1,3-Propanediol(504-63-2)
EPA Substance Registry System	1,3-Propanediol (504-63-2)

Safety Information

Hazard Codes	Xi
Risk Statements	38
Safety Statements	23-24/25
WGK Germany	1
RTECS	TY2010000
Autoignition Temperature	405 °C
TSCA	Yes
HS Code	29053980
Hazardous Substances Data	504-63-2(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 15670 mg/kg LD50 dermal Rabbit > 20000 mg/kg