Plasticizers are the additives that turn rigid PVC into the flexible material used in cables, footwear, films, hoses, and synthetic leather. Among them, DOP (Dioctyl Phthalate) is the most widely used general-purpose plasticizer in India, supported by alternatives such as DBP and non-phthalate options.
Supreme Petro Chemicals supplies plasticizers from Chennai to PVC compounders, cable manufacturers, footwear producers, and flexible-PVC processors across South India.
What Do Plasticizers Do?
PVC on its own is a hard, brittle polymer. Plasticizers work by inserting themselves between the polymer chains, reducing the forces that hold them rigid. The result is a softer, more flexible, more workable material. The type and dosage of plasticizer directly control the final hardness, flexibility, and low-temperature performance of the PVC product.
Common Plasticizers and Their Uses
- DOP (Dioctyl Phthalate, CAS 117-81-7): The general-purpose workhorse. Good balance of cost, performance, and processing. Used in cables, footwear, films, sheets, and moulded goods.
- DBP (Dibutyl Phthalate, CAS 84-74-2): A faster-fusing plasticizer, often used in adhesives, sealants, and as a secondary plasticizer.
- DEP (Diethyl Phthalate, CAS 84-66-2): Used in cosmetics, fragrances, and selected cellulose-based applications.
- CPW (Chlorinated Paraffin Wax): A cost-effective secondary plasticizer and flame retardant, frequently used alongside DOP in cables and footwear.
How to Select the Right Plasticizer
The choice depends on the end product and its requirements:
- Flexibility and hardness target: Higher plasticizer loading gives softer material; the type affects the feel and durability.
- Low-temperature performance: Some applications (cold-climate cables) need plasticizers that keep PVC flexible in cold conditions.
- Cost target: DOP plus a secondary plasticizer such as CPW is a common cost-optimised blend.
- Regulatory requirements: Some export or food-contact applications restrict certain phthalates; confirm the requirement before specifying.
Packaging and Minimum Order
Plasticizers are supplied in 200-litre MS drums, 1000-litre IBC tanks, and bulk tanker loads. MOQ depends on the product, packaging, and delivery location. For continuous compounding, share your monthly consumption so stock and dispatch can be planned ahead.
Storage and Handling
Plasticizers are stable, low-volatility liquids and are not highly flammable, but they should be stored in clean, closed containers away from contamination and extreme heat. Follow the product SDS and your site procedure for handling and PPE.
Get a Plasticizer Quote from SPC
Supreme Petro Chemicals supplies DOP, DBP, DEP, and CPW to PVC processors across South India in drums, IBC tanks, and tanker loads. Contact us for current pricing, or browse our plasticizers catalog.
Grades & Packaging
The plasticizers covered in this guide are each fixed by a CAS number regardless of manufacturer, and are supplied under standard commercial grade names rather than custom specifications:
- DOP (Dioctyl Phthalate): CAS 117-81-7 — also referred to as DEHP in international literature; the standard general-purpose PVC plasticizer grade.
- DBP (Dibutyl Phthalate): CAS 84-74-2 — supplied as a general industrial grade, commonly used as a fast-fusing secondary plasticizer and in adhesives and sealants.
- DEP (Diethyl Phthalate): CAS 84-66-2 — supplied as a general grade for cosmetic and cellulose-based applications.
- CPW (Chlorinated Paraffin Wax): CAS 63449-39-8 — commonly available in 42%, 52%, and 70% chlorine grades, with the 52% liquid grade the standard choice as a secondary plasticizer in PVC and cables.
- Appearance: DOP, DBP, and DEP are typically clear, oily liquids; CPW-52 is a pale-yellow viscous liquid.
- Packaging: Supplied in 200-litre MS drums, 1000-litre IBC tanks, and bulk tanker loads for larger requirements.
- Documentation: Confirm the CAS number and grade name on your purchase order, and request a batch Certificate of Analysis with each delivery.
FAQ
What is the CAS number for DOP, and is it the same as DEHP?
DOP (Dioctyl Phthalate) has CAS number 117-81-7. It is the same substance commonly called DEHP (Di(2-ethylhexyl) phthalate) in international and regulatory documentation, so the two names refer to one material. Always check that the CAS number on the SDS matches your purchase order and specification.
What packaging is available for DOP and other plasticizers?
Plasticizers such as DOP, DBP, DEP, and CPW are supplied in 200-litre MS drums, 1000-litre IBC tanks, and bulk tanker loads for larger volumes. Share your preferred packaging and delivery location when enquiring so dispatch can be planned accordingly.
How do I get a quote for DOP or other plasticizers from SPC?
Share your required quantity, packaging preference, and delivery location via the contact page. Quotes are typically answered within 4 working hours, Monday to Saturday.