PAA (Polyacrylic Acid) is a widely used water-soluble polymer in water treatment, detergents, and dispersants. Proper packaging and storage are crucial to maintain its stability and performance.
1. Packaging Specifications
| Aspect | Requirements |
|---|---|
| Material | Polyethylene (PE) drums or plastic-lined steel containers (corrosion-resistant). |
| Form | Liquid (typically 30–50% aqueous solution) or solid powder. |
| Sealing | Airtight to prevent moisture absorption (powder) or evaporation (liquid). |
| Labeling | Must include: – Product name (PAA or Polyacrylic Acid) – Concentration (%) – Batch number & expiry date |
2. Storage Conditions
| Factor | Requirements | Risks if Not Followed |
|---|---|---|
| Temperature | 5–30°C (optimal). Avoid freezing (<0°C) or high heat (>40°C). | Powder: Caking Liquid: Polymer degradation |
| Humidity | <60% RH (powder must be kept dry). | Powder absorbs moisture → lumps/hardening. |
| Light | Store in darkness (use opaque containers or shaded area). | UV exposure → breakdown of polymer chains. |
| Ventilation | Well-ventilated, cool place (avoid acid/alkali fumes). | Prevents condensation and chemical reactions. |
3. Shelf Life & Stability
-
Unopened Liquid PAA: 12–24 months (depending on concentration).
-
Unopened Powder PAA: 24 months (if kept dry).
-
After Opening:
-
Liquid: Use within 6 months (reseal tightly).
-
Powder: Use within 3 months (store in a desiccator).
-
4. Handling & Safety
-
Personal Protection: Wear gloves & goggles (can irritate skin/eyes).
-
Incompatible Materials: Avoid contact with:
– Strong oxidizers (e.g., hypochlorite)
– Cationic polymers (risk of precipitation). -
Spill Management: Absorb with inert material (sand, sawdust) and rinse with water.
5. Transport Requirements
-
Non-hazardous (no UN number required for low-concentration solutions).
-
Avoid extreme temperatures during shipping (no direct sunlight or freezing).
-
Powder PAA: Secure packaging to prevent moisture ingress.
Key Reminders
-
Powder PAA is highly hygroscopic → must be stored in a moisture-proof environment.
-
Liquid PAA may stratify over time → gently mix before use.
-
Do not store near acids/bases → neutral pH (6–8) is ideal for stability.
For specific storage advice (e.g., tropical climates), consult the manufacturer’s SDS (Safety Data Sheet).