Zinc Diethylphosphinate（ZDP950）
| HS Code | 739764 |
| Chemical Formula | C4H10O4P2Zn |
| Molecular Weight | 283.50 g/mol |
| Appearance | White powder |
| Solubility | Insoluble in water |
| Melting Point | 340 - 350 °C |
| Decomposition Temperature | Above 300 °C |
| Density | 1.65 g/cm³ |
| Flammability | Non - flammable |
| Thermal Stability | Good |
| Lubricity | Good |
| Odor | Odorless |
As an accredited Zinc Diethylphosphinate（ZDP950） factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaging Zinc Diethylphosphinate (ZDP950), industrial grade uses galvanized iron barrels lined with polyethylene, the barrel lid is embedded with nitrile rubber pads, and lead seals are added after tightening; electronic grade uses brown glass bottles, equipped with polytetrafluoroethylene plugs, wrapped with foam sleeves, and placed in anti-static wooden boxes, all marked with "moisture-proof" to prevent moisture absorption and pollution. |
| Storage | Zinc Diethylphosphinate (ZDP950) should be stored in a dry and clean warehouse, just like storing treasure in a clean room, away from dust and moisture. Iron barrels should be placed separately and not stacked, for fear of deformation and leakage under heavy pressure; glass bottles should be placed on low shelves to prevent tipping and breaking. |
| Shipping | Transport Zinc Diethylphosphinate (ZDP950) in a van, iron barrels are fixed in the compartment, glass bottles and boxes are filled with cushioning cotton, loading and unloading are handled with care, and it is prohibited to transport on rainy days. If the packaging is damaged, change the container in a dry environment, and do not let Zinc Diethylphosphinate (ZDP950) get wet. |
Competitive Zinc Diethylphosphinate（ZDP950） prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
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Tel: +8615380400285
Email: sales2@liwei-chem.com
Historical Development
In ancient times, metals were mostly protected from corrosion by applying grease. In modern times, polymer materials need to be highly flame-retardant. Craftsmen developed zinc products based on aluminum phosphonates. Zinc Diethylphosphinate (ZDP950) was born to meet this need. Initially, it had poor compatibility with resins. After five years of process optimization, it has become an important flame-retardant material for engineering plastics.
Product Overview
Zinc Diethylphosphinate (ZDP950) is a white powder, odorless, and insoluble in water. It has good compatibility with polyamide and polyester. Its flame-retardant efficiency is better than similar products. A small amount of addition can achieve a high flame-retardant level. It is mostly used in precision electronic components and automotive parts without affecting the mechanical properties of the material.
Physical & Chemical Properties
Zinc Diethylphosphinate (ZDP950) has a density of 1.5g/cm³, a melting point of about 280℃, a particle size of 3-8μm, a delicate feel, and releases flame-retardant gas when decomposed by heat. It is non-flammable, non-corrosive to copper and iron, chemically stable at room temperature, and not easy to absorb moisture.
Technical Specifications & Labeling
The standard of Zinc Diethylphosphinate (ZDP950) is purity ≥99%, phosphorus content ≥23%, moisture ≤0.1%. The full name Zinc Diethylphosphinate (ZDP950) must be written on the label, and the particle size distribution and purity test report must be attached.
Preparation Method
To prepare Zinc Diethylphosphinate (ZDP950), diethylphosphonic acid and zinc oxide are used as raw materials. The reaction is heated and stirred in a reactor. After crystallization, centrifugal separation, and vacuum drying, Zinc Diethylphosphinate (ZDP950) is obtained. The temperature is controlled to prevent the formation of by-products.
Chemical Reactions & Modifications
Zinc Diethylphosphinate (ZDP950) decomposes into zinc phosphate and organic phosphine compounds at high temperatures to form a dense flame retardant layer. It has significant synergy when combined with nitrogen flame retardants. It does not react with plastics and metals at room temperature and is stable in storage.
Synonyms & Product Names
Zinc Diethylphosphinate (ZDP950) is also known as "zinc diethylphosphinate (ZDP950)", but in trade and technical documents, the full name Zinc Diethylphosphinate (ZDP950) must be used to indicate specifications.
Safety & Operational Standards
When operating Zinc Diethylphosphinate (ZDP950), you must wear a dust mask and gloves, operate in a ventilated area to avoid inhalation of dust, wash your hands after work, and isolate the storage area from food and pharmaceutical raw materials to prevent accidental mixing.
Application Area
Zinc Diethylphosphinate (ZDP950) is mostly used in engineering plastics such as PA6, PA66, and PBT as a flame retardant additive. It is widely used in connectors, relays, and automotive wiring harnesses, and the flame retardant level can reach UL94 V-0 (0.8mm).
Research & Development
Artisans are developing surface modification technology for Zinc Diethylphosphinate (ZDP950) to improve its dispersibility in polymer materials, and explore compounding solutions with other flame retardants to reduce use costs and expand application areas.
Toxicity Research
Zinc Diethylphosphinate (ZDP950) has low toxicity, with rat oral LD50>6000mg/kg, no teratogenicity or carcinogenicity, long-term exposure to dust may cause mild respiratory discomfort, and it is safe and harmless under standardized operation.
Future Prospects
As the flame retardant requirements of the electronics and automotive industries increase, the demand for Zinc Diethylphosphinate (ZDP950) will increase by 12% annually, and its process will develop towards green development, or it may be used in 5G and new energy fields, becoming a mainstream product of high-end flame retardants.
Where to Buy Zinc Diethylphosphinate（ZDP950） in China?
As a trusted Zinc Diethylphosphinate（ZDP950） manufacturer, we deliver:
Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements.
Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery.
Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
As a leading Zinc Diethylphosphinate（ZDP950） supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
How to precisely control the reaction conditions of raw materials when preparing Zinc Diethylphosphinate (ZDP950)?
This material is made by accurately weighing 99% pure diethylphosphonic acid and analytical pure zinc oxide in a 2:1 molar ratio and adding them to a 500L enamel reactor. Add 200L deionized water as solvent, start stirring, adjust the speed to 50 rpm, raise the temperature to 85℃, and keep the temperature difference within ±1℃. During the 4 hours of reaction, take samples every hour to measure the pH value, and fine-tune it to 5.0 with dilute phosphoric acid or zinc oxide powder. Just like the chef controls the salt, if it is too acidic, unreacted diethylphosphonic acid will remain, and if it is too alkaline, zinc hydroxide impurities will be generated. After the reaction, the solution was filtered through an 800-mesh filter cloth to remove the residue, and the filtrate was placed in a vacuum concentration tank and concentrated to a solid content of 70% at 60°C. It was then centrifugally spray-dried (inlet air 180°C, outlet air 80°C) to obtain a white powder, namely Zinc Diethylphosphinate (ZDP950). Its purity was 99% as detected by HPLC, with a zinc content of 18%±0.3%, a phosphorus content of 23%±0.2%, and a moisture content of <0.1%. This process is like quenching a sword, which requires no error to obtain a product with uniform particles and stable performance.
What is the effect of Zinc Diethylphosphinate (ZDP950) in polyolefin plastics?
This product is added to polypropylene (PP) at a dosage of 20%, supplemented with 8% antimony trioxide for synergy, and mixed by a twin-screw extruder (temperature 180-200℃). The flame retardant of injection molded strips reaches UL94 V-0 level (1.6mm), and the oxygen index increases from 18% to 30%. The tensile strength is retained at 88%, reaching 32MPa, and the impact strength is 4.2kJ/m², which is only 10% lower than that without addition. In low-density polyethylene (LDPE), the addition amount is 25%, the film thickness is 0.1mm, and it self-extinguishes when burning, without dripping, and the light transmittance is retained at 75%. It has good compatibility with polyolefins. After heat aging at 100℃ for 7 days, there is no frost on the surface, so it is suitable for wire and cable insulation layers, plastic films, etc., taking into account both flame retardancy and mechanical properties.
What is the difference between Zinc Diethylphosphinate (ZDP950) and other metal phosphonates?
Compared with Aluminum Diethylphosphinate (ADP1000), Zinc Diethylphosphinate (ZDP950) has better dispersibility in polyolefins, and there is still no agglomeration when the particle size is 15μm, while ADP1000 needs to be controlled below 10μm. The flame retardant efficiency is slightly higher, and the oxygen index is 2-3 percentage points higher at the same addition amount, because the zinc ion has a stronger catalytic carbonization ability. Its thermal decomposition temperature is 340℃, which is 30℃ higher than that of magnesium phosphonates, so it is suitable for polyolefin blends with higher processing temperatures. Although the cost is 10% higher than ADP1000, the amount used in thin products can be reduced by 5%, and the overall cost is lower, which is the preferred choice for specific scenarios.
How is the temperature resistance of Zinc Diethylphosphinate (ZDP950) reflected?
When added to PP strips at 15% and placed in a 120℃ oven for 30 days, the flame retardant level remains V-0, and the oxygen index decreases by less than 1%. In the 200℃ thermal weight loss test, the weight loss rate in 1 hour is only 0.8%, which is much lower than the 3.5% of calcium phosphonates. It does not decompose or discolor when in contact with high-temperature molten polyolefins, so there is no odor during injection molding and no fouling on the die head. This feature makes it suitable for polyolefin parts around automobile engines, which can withstand long-term high temperatures without failure, and its flame retardant properties are as stable as before.
What are the storage and processing specifications for Zinc Diethylphosphinate (ZDP950)?
This product needs to be packaged in four-layer aluminum foil vacuum bags, 20kg per bag, with silica gel desiccant inside the bag and moisture-proof corrugated paperboard outside. Store in a concrete warehouse, install an automatic temperature and humidity recorder, control the temperature <30℃, and the relative humidity <55%; the bottom is padded with a 10cm high wooden pallet, and the stacking does not exceed 6 bags, with a stacking distance of ≥50cm for easy ventilation. No pre-drying is required before processing, and it can be directly mixed with the resin, saving energy consumption in the 2-hour drying process. In the twin-screw extruder, the screw combination adopts a weak shear configuration, and the speed is preferably 250 rpm to avoid high shear causing molecular chain breakage. The dust is of medium emission, and the workshop needs to be equipped with a central dust removal system (air volume 1500m³/h). Operators need to wear KN95 masks and nitrile gloves. The equipment needs to be grounded (resistance <10Ω) to prevent static electricity, and a dust concentration alarm (alarm value 50mg/m³) needs to be installed above the hopper. If it absorbs moisture and forms agglomerates accidentally, it can still be used after being dried with hot air at 80℃ for 2 hours and sifted through an 80-mesh sieve, and its flame retardant performance remains unchanged.
