DINP Plasticizer Properties Uses and Safety Overview

Chemical Overview & Technical Specifications

Are you struggling to balance processing efficiency with long-term flexibility in your vinyl compounds? We supply premium Diisononyl Phthalate (DINP), a high-molecular-weight branched phthalate plasticizer engineered to replace legacy general-purpose plasticizers. Designed with a branched C9 alcohol backbone, DINP delivers superior permanence, lower volatility, and exceptional thermal stability into flexible vinyl matrices.

High Molecular Weight Plasticizer for Flexible PVC

As a primary flexible PVC additive, DINP effectively reduces the glass transition temperature of vinyl resins, allowing for smoother melt flow and enhanced flex life. We manufacture and supply refined di-isononyl phthalate liquid to meet exact global manufacturing standards.

DINP Technical Datasheet

Property / Parameter	Specification	Standard / Conditions
Chemical Name	Diisononyl Phthalate (DINP)	Branched C9 phthalate ester
CAS Registry Number	CAS 28553-12-0 / CAS 68515-48-0	Global regulatory listings
Molecular Formula	C26H42O4	Molar Mass: ~418.6 g/mol
Physical Appearance	Clear, colorless, oily liquid	Free from suspended matter
Purity (Ester Content)	>= 99.5%	High-grade purity tier
Moisture Content	<= 0.1% max	Critical for void-free extrusion
Color Index	<= 30 APHA	Preserves clear compound optics
Acid Value	<= 0.07 mg KOH/g max	Maintains polymer degradation resistance
Specific Gravity (20°C)	0.972 – 0.978 g/cm³	Consistent volumetric batching

Key raw material advantages for your production line:
Strict Moisture Limits: Keeps water content under 0.1% to eliminate foaming, surface blistering, and micro-voids during high-heat processing.
High Chemical Purity: Minimum 99.5% ester content ensures optimal solvency and rapid fusion rates in PVC plastisols and dry blends.
Optical & Color Stability: Low APHA color ratings preserve precise pigmentation in transparent films, white profiles, and liquid coatings.

Industrial Performance Benefits of DINP

We rely on DINP (Diisononyl Phthalate) to give flexible PVC products the durability and performance modern manufacturing demands. As a premium high molecular weight plasticizer, DINP outperforms legacy options by holding up under tough thermal and mechanical stress.

Low Volatility and Thermal Stability

During high-temperature extrusion loops, DINP maintains exceptional thermal stability. Its low volatility prevents material loss, gas emissions, and degradation during intensive processing cycles.

• Lower emissions: Minimizes volatile organic compound (VOC) release during heat-intensive runs.
• Consistent thickness: Prevents shrinkage and premature hardening in extruded vinyl profiles.
• Extended heat resistance: Maintains physical integrity under continuous thermal exposure.

Superior Resistance to Migration and Extraction

Compared to lower molecular weight alternatives like DOP (DEHP), DINP stays anchored inside the polymer matrix. It resists leaching out when exposed to soapy water, oils, or outdoor weather.

Performance Metric	DINP (Diisononyl Phthalate)	DOP / DEHP (Legacy)
Molecular Weight	High (~418 g/mol)	Medium (~390 g/mol)
Volatility Loss	Extremely Low	Moderate to High
Extraction Resistance	Superior (Water & Oil)	Baseline
Product Lifespan	Long-term durability	Susceptible to embrittlement

Processing Efficiency and Plastisol Stability

In high-speed production environments, DINP acts as a versatile flexible PVC additive. It offers stable plastisol viscosity over prolonged storage periods, ensuring steady flow and reliable coating application.

• Viscosity stability: Prevents unwanted thickening in liquid plastisol formulations.
• Rapid vinyl fusion: Speeds up gelation rates for faster line speeds without burning the compound.
• Smooth surface finish: Delivers uniform wall thickness and defect-free surfaces in molded or dipped vinyl goods.

Target Industries & Processing Applications

We engineered our DINP (Diisononyl Phthalate) to serve as the backbone for heavy-duty flexible PVC compounding. Because it offers superior permanence and stability, major manufacturers rely on this vinyl plasticizer supplier grade to maintain product integrity under harsh environmental conditions.

Here is exactly where our high molecular weight plasticizer delivers the highest value across the global market:

Wire, Cable, and Automotive Sheathing

High-performance electrical systems require strict thermal endurance. Our plasticizer for wire and cable applications ensures long-term flexibility and prevents cracking in protective jacketing.
Automotive Insulation: Withstands the elevated under-hood temperatures of modern vehicle architectures.
Power Cables: Retains dielectric properties and prevents brittle failures over decades of service.

Building, Construction, and Infrastructure Membranes

Outdoor installations demand durable weathering resistance. As a rugged flexible PVC additive, our di-isononyl phthalate liquid prevents degradation caused by constant UV exposure and temperature swings.
Roofing Membranes: Delivers excellent elastomeric performance and dimensional stability.
Waterproofing Tarpaulins: Resists environmental stress cracking and water leaching.

Industrial Polymer Additives & Plastisols

For high-precision dipping, coating, and sealing, our PVC plasticizer chemical guarantees stable viscosity profiles during high-speed production loops.

Application	Key Benefit of Our DINP
Industrial Coatings & Sealants	Excellent substrate adhesion and low volatile emissions.
PVC Gloves & Protective Gear	Superior tensile strength and reliable tactile flexibility.
Textile Plastisols	Outstanding washability and resistance to soapy water extraction.

Global Regulatory Status & Safety Standards

Navigating international compliance for DINP can be tricky, but we make it straightforward. As a high-molecular-weight phthalate plasticizer, DINP is regulated differently than older, low-molecular-weight options like DOP. We ensure our materials meet strict global benchmarks, so your flexible PVC products stay compliant wherever you sell them.

CPSIA & EU REACH Compliance

Regional laws set clear limits on plasticizer concentrations, particularly in consumer goods, toys, and childcare items. We continuously test our DINP supply chain to ensure full alignment with these core standards:

• EU REACH Annex XVII: Regulates specific usages to ensure safe indoor and industrial application.
• US CPSIA Requirements: Strictly limits concentrations to under 0.1% for restricted commercial categories.
• Global Traceability: Batch-level documentation verifies chemical purity and consistency from manufacture to delivery.

California Proposition 65 & Safety Protocols

DINP is listed under California’s Proposition 65, which requires clear warning labels and exposure assessments for products distributed in California. We provide detailed Safety Data Sheets (SDS) and technical specs to simplify your product labeling and risk management.

Compliance Area	Standard / Protocol	Key Requirement
US Federal	CPSIA	Mass fraction limit < 0.1% in restricted products
European Union	REACH Annex XVII	Specific industrial & consumer restriction guidelines
State Level	California Prop 65	Clear warning disclosures & workplace safety data
Workplace Safety	Safety Data Sheets (SDS)	Mandatory PPE protocols & safe handling instructions

Handling Safety & Workplace PPE

Protecting your production line team is critical when blending or processing diisononyl phthalate. While DINP features low vapor pressure and high thermal stability, standard industrial hygiene protocols must always be maintained:

• Personal Protective Equipment (PPE): Nitrile gloves, safety goggles, and adequate shop ventilation during high-temperature mixing loops.
• Storage Conditions: Keep containers tightly sealed in cool, dry areas away from strong oxidizing agents.
• Material Tracking: Every shipment includes certificates of analysis (COA) to guarantee full batch traceability.

Secure Sourcing & Logistics Architecture for DINP

We maintain a bulletproof supply chain for our DINP (Diisononyl Phthalate), ensuring every shipment meets precise industrial standards before it ever reaches your facility. From strict quality control to flexible bulk shipping, we handle the heavy lifting so your production lines never stall.

Third-Party Verification & Quality Control

We eliminate risk from your chemical sourcing. Every single batch of our PVC plasticizer chemical undergoes strict pre-shipment testing. We partner with elite international labs to verify purity, moisture levels, and chemical integrity before dispatch.

• SGS & BV Inspection: Independent verification certifying that every batch meets global technical data sheets.
• Certificates of Analysis (CoA): Provided with every delivery to guarantee exact specification matches.
• Contamination Prevention: Dedicated loading protocols prevent cross-contamination during transit.

Commercial Packaging Options

Whether you run a agile local compounding plant or a massive multi-national wire and cable extrusion facility, we offer scalable packaging solutions tailored to your infrastructure.

Packaging Type	Capacity (Approx.)	Best For
Steel Drums	200 kg / Drum	Small to medium batches, easy manual handling
IBC Totes	1,000 kg / Tote	Medium-scale flexible PVC compounding
ISO Tanks	20,000 - 25,000 kg	High-volume industrial polymer additive users

Global Supply Chain & Customs Management

Navigating international logistics requires experience and precision. We manage the entire export and import pipeline, securing reliable freight lanes and streamlined customs clearance for our global partners.

• Customs Compliance: Flawless documentation handling to prevent port delays and demurrage.
• Buffer Stocks: Strategic warehousing to absorb market shocks and ensure a reliable phthalate plasticizer bulk supply.
• Just-In-Time Delivery: Tailored logistics schedules that match your specific production loops.

DINP Frequently Asked Questions (FAQs)

What is the main advantage of using DINP over DOP (DEHP)?

Compared to traditional DOP (DEHP), DINP provides significantly lower volatility and superior thermal stability. As a high molecular weight plasticizer, it stays locked inside the polymer matrix longer, preventing premature aging and brittleness in flexible PVC products while offering a better toxicological profile for global regulatory compliance.

Is DINP compatible with all types of flexible PVC compounding?

Yes. Diisononyl Phthalate exhibits excellent compatibility with standard PVC resins, copolymers, and secondary plasticizers. It integrates smoothly into both dry blending and plastisol formulations, maintaining stable viscosity during processing.

PVC Processing Type	DINP Compatibility	Performance Benefit
Extrusion & Injection Molding	Excellent	Smooth surface finish, low compound volatilization
Plastisol Coating / Dipping	High	Stable aging viscosity, predictable gelation rates
Calendering	Excellent	High tensile strength, superb sheet uniform thickness

What are the standard bulk packaging and shipping options for global logistics?

We supply phthalate plasticizer bulk orders globally through heavy-duty, industrial-grade packaging designed to maintain product purity during transit.

• ISO Tanks: Ideal for large-scale bulk chemical shipments (~20,000 to 25,000 kg).
• IBC Totes: Intermediate bulk containers (~1,000 kg) for flexible factory floor handling.
• Steel Drums: Standard tight-head steel drums (~200 kg) for smaller production batches.

How does DINP handle high-temperature applications like automotive wiring?

Di-isononyl phthalate liquid excels in high-heat environments. Its large molecular structure ensures that under continuous thermal stress—such as in plasticizer for wire and cable insulation—the additive does not easily migrate or evaporate. This keeps the protective vinyl jacketing flexible and crack-resistant over a long service life.