Calcium Stearate is a metal soap used as an acid scavenger, lubricant, and anti-hydrolysis agent. It neutralizes acids and improves melt flow in polymers.
| Parameter | Value | Test Method |
| Appearance | White powder | Visual inspection |
| Melting Point (°C) | ~140 | DSC |
| Moisture Content (%) | <0.5 | Karl Fischer titration |
| pH (5% aqueous) | 9 – 11 | pH meter |
| Particle Size (µm) | 3 – 10 | Laser diffraction |
Q1: How does it prevent hydrolysis?
A1: Scavenges residual acids and moisture.
Q2: Is it compatible with PVC?
A2: Yes, widely used in PVC formulations.
Q3: Can it improve processing?
A3: Yes, reduces viscosity and improves flow.
Q4: What is shelf life?
A4: 1–2 years if stored properly.
Q5: Handling precautions?
A5: Avoid dust inhalation; use PPE.
