Calcium Zinc Stabilizer Uracil FAQ: Specifications, Ordering and Support Questions

Buyers and procurement teams evaluating a calcium zinc stabilizer for PVC processing, plastic additives, or pharmaceutical intermediate use frequently ask the same core questions about product identity, performance, compliance, and ordering. The answers below are drawn directly from confirmed product documentation for HEBEI GUANGXING CHEMICAL INDUSTRY CO., LTD.'s Calcium Zinc Stabilizer Uracil.

What is Calcium Zinc Stabilizer Uracil, and what is its chemical identity?

Calcium Zinc Stabilizer Uracil is the commercial product name for 6-Amino-1,3-dimethyluracil, a key raw material used in producing calcium zinc stabilizers for PVC. Its confirmed identifiers are:

What are the key physical and chemical specifications?

The confirmed specification data for this calcium zinc stabilizer material is:

• Chromatographic purity: ≥ 99.0%
• Loss on drying: ≤ 1.0%
• Melting point: 295 °C (dec.) (lit.), decomposes at approximately 293 °C
• Appearance: Off-white to light yellow powder
• Packaging: 25 kg/bag

What certifications does this product hold?

The product is confirmed to carry the following certifications and registrations:

• EU REACH
• TURKEY KKDIK
• EU RoHS
• ISO 9001:2015
• ISO 14001:2015
• ISO 45001:2018

The EU REACH registration for 6-Amino-1,3-dimethyluracil was completed in 2018.

How does 6-Amino-1,3-dimethyluracil function as a PVC heat stabilizer?

Pure PVC resin is highly sensitive to heat and begins to thermally decompose at temperatures from 90 °C upward, with significant degradation occurring at 120 °C or above. Adding 6-Amino-1,3-dimethyluracil as a stabilizer component effectively prevents heat-induced degradation during PVC processing, maintaining the resin's performance and stability.

Compared with ordinary calcium zinc stabilizers and organotin stabilizers, this uracil-based material offers better UV absorption and improved weather resistance, which enhances the aging resistance of the finished product.

Calcium zinc stabilizers — of which this uracil compound is a key raw material — are synthesized via a special composite process combining calcium salts, zinc salts, lubricants, antioxidants, and other components. They can replace toxic lead/cadmium salt and organotin stabilizers while delivering good thermal stability, photostability, transparency, and coloring power. Processing performance in PVC resin products is reported to be good, with thermal stability equivalent to that of lead salt stabilizers.

Is this product free of heavy metals such as lead and cadmium?

Yes. According to confirmed product documentation, 6-Amino-1,3-dimethyluracil is an environmentally friendly, non-toxic raw material for PVC stabilizers. It is free of heavy metals such as lead and cadmium, making it a green, non-toxic stabilizer option suitable for applications where RoHS and similar environmental compliance is required.

What are the main application areas for this calcium zinc stabilizer material?

Confirmed application areas include:

1. PVC heat stabilizer – The primary application. Used to prevent thermal degradation of PVC during processing and to improve weather and aging resistance.
2. Plastic plasticizer / processing aid – The organic amino group in the molecular chain provides a toughening and melt-promoting effect, improving flexibility and processing properties of plastics.
3. Pharmaceutical intermediates – Used as an intermediate in the synthesis of certain pharmaceutical compounds with specific biological activities.
4. Synthetic material intermediate – Can serve as a raw material or additive in the preparation of polymer materials, plastics, rubber, and other synthetic materials to improve weather resistance and flexibility.

What is the standard packaging, and are samples available?

The standard packaging is 25 kg per bag. Product samples are confirmed as available. Buyers wishing to evaluate the material before placing a commercial order should contact HEBEI GUANGXING CHEMICAL INDUSTRY CO., LTD. directly to request a sample.

What brand name is associated with this product, and who manufactures it?

The product is sold under the Guangxing brand name and is manufactured by HEBEI GUANGXING CHEMICAL INDUSTRY CO., LTD., located in the Chemical Industrial Park of Xinhe County, Xingtai City, Hebei Province, China. The company identifies itself as the first and largest uracil production enterprise in China specializing in PVC heat stabilizers, and holds ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 system certifications.

All specifications and certifications listed above are sourced from confirmed product documentation. Buyers should verify current compliance requirements for their specific region and end-use application.