Description

1,3-propanediol

1,3-Propanediol is a clear, colorless liquid with almost no smell. It works really well as a moisturizer, solvent, and stabilizer, and performs excellently in polymer applications.
Main Applications

Polymers: Main building block for high-performance PTT fibers and other polyesters.
Personal Care & Cosmetics: Popular humectant and solvent in skincare, hair care, and makeup products.
Industrial Use: Commonly found in paints, coatings, adhesives, antifreeze, surfactants, and ester production.

Key Features

High purity, ranging from 99.0% to 99.9% depending on the grade
Low volatility, mixes well with water, and is slightly hygroscopic
Bio-based versions available (made from corn fermentation) - much more environmentally friendly
Available in Industrial, Cosmetic, and Polymer grades

Typical Specifications

Purity (GC): ≥99.5% / ≥99.8%
Moisture: ≤0.1%
Appearance: Clear, colorless liquid

Packaging: 1 kg, 5 kg, 25 kg, 200 kg drums, or ISO tanks. Custom options are possible.
MOQ: Flexible - we can start from as little as 1 kg.
Certifications: ISO 9001, ISO 14001, REACH. Cosmetic-grade and GMP certificates available upon request.
Other names: 1,3-PDO, Propan-1,3-diol, Trimethylene glycol.
CAS: 504-63-2 | Molecular Formula: C₃H₈O₂
When you inquire, please let us know which grade you need (polymer, cosmetic, or industrial), your purity requirements, and preferred packaging. We'll quickly send you samples, COA, and all the technical documents you need.

Product Characteristics

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Structure

Linear α,ω-diol with two primary hydroxyl groups, offering unique reactivity.

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Appearance

Colorless, odorless, viscous liquid; hygroscopic, miscible with water; boiling point ~214 °C.

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Origin

vailable as petrochemical-based and bio-based (from corn fermentation); the latter offers high purity and a low carbon footprint.

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Polyester Monomer

Core building block for PTT polyester, imparting high elastic recovery and stain resistance to fibers used in premium textiles and carpets.

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Cosmetic Function

Serves as a humectant, emollient, and solvent in cosmetics; provides a light, non-irritating skin feel.

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Safety & Environment

Low toxicity, readily biodegradable; a green alternative to traditional glycols like propylene glycol.

COA (Certificate of Analysis) – Liquid Grade

Benefits of Limonene

01Long-Lasting Hydration

It draws in moisture and holds it there, giving long-lasting hydration without any sticky or greasy feel.

02Bio-Based

The bio-based version (made from corn sugar) seriously lowers the carbon footprint while performing just like the petrochemical kind.

03Safe & Gentle

It's very gentle on skin-much less irritating than propylene glycol-plus it has low toxicity and breaks down readily in the environment, making it kind to both people and the planet.

04Excellent Solvent

It dissolves active ingredients easily and improves product texture, working well with water and many organic solvents.

05PTT Monomer

As the key monomer for PTT polyester, it gives fabrics excellent stretch recovery, built-in stain resistance, and a soft, cotton-like hand feel.

06Preservative Booster

It enhances preservative performance, so you can often dial back harsher preservatives and still keep the product properly protected.

Application Fields

Textiles & Carpets: This is one of its biggest uses. It's the key building block for making PTT polyester fibers, which create soft, stretchy, and stain-resistant fabrics and carpets.
Cosmetics & Personal Care:Works great as a lightweight, non-sticky moisturizer and solvent. You'll find it in serums, creams, lotions, and facial cleansers.
Polyurethanes: Adds excellent flexibility and durability to coatings, adhesives, sealants, and elastomers.
Industrial Fluids: A safer, lower-toxicity choice for heat transfer fluids, antifreeze, and other industrial liquids.
Pharmaceuticals: Acts as a gentle solvent and excipient to help dissolve active ingredients in various drug formulations.
Unsaturated Polyester Resins: Used in specialty resins to boost impact strength and corrosion resistance.

Production Process

13-

Product Quality Advantage

Purity

≥99.8%, with premium bio-based grades reaching 99.9% - minimal side reactions.

Color

APHA <10, water-white and clear, won't tint your formulation.

Aldehydes

Carbonyls (e.g., propionaldehyde) <10 ppm, often below 5 ppm - clean, non-irritating odor.

Acidity

≤0.001% as acetic acid, virtually non-corrosive to stainless steel equipment.

Water

≤0.1%, won't interfere with moisture-sensitive reactions like polyurethanes or polyesters.

Iron & Metals

Iron <0.5 ppm, preventing catalytic discoloration and storage instability.

Professional ODM/OEM Services

We provide full OEM/ODM manufacturing for finished products using 1,3-propanediol, supplied as a liquid or in encapsulated powder form.

① Finished Dosage Forms
Softgels fill liquid 1,3-PDO or custom blends into gelatin or vegetarian shells, great for beauty-from-within supplements; vegetarian capsules use liquid-filled plant-based shells, ideal for clean-label moisturizing formulas; effervescent tablets combine encapsulated powder with citric acid and bicarbonate for daily hydration drinks; gummies and chews rely on encapsulated powder to stop stickiness, moisture release, and texture softening; powdered drink mixes use encapsulated 1,3-PDO to deliver humectant benefits and a mild sweetness boost, with no unpleasant taste; topical serums and creams include high-purity 1,3-PDO as a moisturizer and penetration booster, usually at 2–10%; and we also offer pre-diluted liquid solutions for cosmetic, food, or pharmaceutical manufacturers.

② Custom Options
You can adjust the active load in encapsulated powder, choosing from 30%, 50%, or 70%; pick a carrier such as maltodextrin, gum arabic, modified starch, or silica; and run stability testing that tracks purity, aldehyde content, and moisture over time under accelerated conditions.

Export Certificates

Certificates HACCP ISO HALAL GMP Kosher

Why choose us

XI'AN LANDNUTRA CO., LTD. – Your Trusted Manufacturer of High-Purity 1,3-Propanediol
Rooted in Quality, Driven by Expertise, Committed to Health and Excellence.

Strong Production Capability: annual capacity 3,000 metric tons, over 15 years of glycol and functional ingredient experience, and our own cGMP-compliant facility.

Leading Service: one-stop OEM/ODM, from early formulation advice right through to after-sales support, covering liquids, powders, and finished forms.

Quality Assurance: ISO 9001 and cGMP-certified, with purity ≥99.8% ensured at every stage - from raw material sourcing to final packing.

Broad Market: cosmetics and personal care, PTT polyesters, polyurethanes, industrial fluids, and pharmaceutical excipients.

With 15+ years in functional glycol processing and supply, we run cGMP facilities for liquid filling and powder encapsulation; our in-house OEM/ODM serves supplements, cosmetics, and industrial formulations; we handle global regulatory paperwork (REACH, COSMOS, HALAL, and more); every batch ships with a COA covering GC purity, APHA color, aldehydes, acidity, water, and metals; our technical team helps you choose the right grade, avoid moisture problems, and keep sensitive actives stable.

FAQ

Q1: Is 1,3-Propanediol the same as conventional propylene glycol?

A: No. 1,3-Propanediol has terminal hydroxyl groups, offering distinct reactivity, better polyester elasticity, and significantly lower skin irritation than 1,2-propanediol.

Q2: Is your 1,3-Propanediol bio-based or petrochemical-based?

A: We primarily supply bio-based 1,3-PDO from corn fermentation, with a low carbon footprint and up to 99.9% purity. Petro-based is available, but bio-based is now the industry standard for cosmetics and advanced materials.

Q3: What level of purity can you guarantee, and what supporting data is available?

A: Standard purity ≥99.8%, premium grade 99.9%. Every shipment includes a COA covering GC purity, APHA color (<10), aldehydes, moisture, acidity, and iron. The product is water-white and ready for direct formulation.

Q4: What are its primary benefits in skincare formulations?

A: Strong moisturization, a light non-tacky feel, and very low irritation. It is widely used in sensitive skin and baby care products, typically at 3–10% in serums and lotions.

Q5: Do you supply polymerization-grade for PTT fiber production?

A: Yes, we have a dedicated polymer grade with stricter controls on purity, aldehydes, and moisture. We can provide small trial quantities and offer technical support if needed.

Q6:How should it be stored? Is it hygroscopic?

A: Yes, it absorbs moisture easily, so always keep the container tightly sealed. When stored properly, it remains stable for years. We can share detailed stability data upon request.

Q7: Can we order a small amount for testing? What's the MOQ?

A: Absolutely. We welcome samples and small trial orders. The minimum order quantity depends on the packaging and grade - just let us know what you need and we'll work with you.

Q8: Do you offer OEM/ODM services for finished products like capsules or drink mixes?

A: Yes, we do full OEM/ODM. We can handle liquid filling for softgels or veggie capsules, as well as microencapsulated powder for drink mixes, tablets, and gummies. Custom loading and complete turnkey support from formulation to final packaging are available.

Test Item	Specification (FCC Grade)	Test Result	Conclusion
Appearance	Colorless clear liquid, free from visible impurities	Conforms	Pass
Assay (1,3-Propanediol, GC)	FCC/USP ≥99.7%; In-house ≥99.8%	98.2%	Pass
Color (Hazen / APHA)	≤10	3.2	Pass
Water Content	≤0.1% (≤1000 ppm)	0.028% (280 ppm)	Pass
Acidity (as Acetic Acid)	≤0.013%	0.0015%	Pass
Specific Gravity (20°C)	1.050 ~ 1.055	1.052	Pass
Refractive Index (20°C)	1.435 ~ 1.440	1.437	Pass
Residue on Ignition / Ash	≤0.001%	<0.001%	Pass
Heavy Metals (as Pb)	≤10ppm	<5ppm	Pass
E. Coli / Salmonella	Negative	Negative	Pass
Total Plate Count	≤1000CFU/g	<100CFU/g	Pass
Escherichia coli / Salmonella	Absent	Absent	Pass

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