As a non-ionic polymer, Polypropylene Glycol PPG-200 may encounter problems typically related to storage conditions, formulation compatibility, or operating procedures:
1. Abnormal appearance of product (turbidity, stratification, color deepening): PPG-200 normally appears as a colorless to slightly yellow transparent viscous liquid. If abnormal turbidity or stratification occurs, the possible cause may be too low storage temperature leading to increased viscosity or moisture absorption. It is recommended to check whether the storage environment meets the requirement of 5–35°C and whether the container is kept airtight. If the product has exceeded the 24-month storage period, retesting is required before continued use.
2. Unsatisfactory emulsification or dispersion effect: PPG-200 has excellent emulsification and dispersion capabilities, but if the effect is poor, possible causes include: insufficient addition amount, poor compatibility with other components, or the system pH or temperature exceeding the applicable range. It is recommended to gradually adjust the addition ratio within the recommended dosage range, and confirm whether there are strong oxidizers or strong acids/bases in the formulation that are incompatible with polypropylene glycol.
3. Abnormally high viscosity and difficult handling: The viscosity of PPG-200 increases significantly under low temperature conditions. The product can be rewarmed to 20–30°C before use, but direct heating or proximity to ignition sources is strictly prohibited (flash point >150°C, still fire prevention needed). After appropriate warming and stirring, normal fluidity can be restored.
4. Discomfort caused by eye or skin contact: According to GHS classification, PPG-200 may cause eye irritation (H319). In case of contact, eyes should be rinsed immediately with plenty of water or saline for at least 15 minutes, and skin should be thoroughly washed with plenty of water and soap. If irritation persists, seek medical attention and present the product Safety Data Sheet.
Hai'an County Guoli Chemical Co., Ltd. provides multi-level after-sales technical support services to all product users:
| Parameter | Value |
|---|---|
| Product name | Polypropylene Glycol PPG-200 |
| Chemical name | Polyoxypropylene diol |
| CAS No. | 25322-69-4 |
| Appearance | Colorless to slightly yellow transparent viscous liquid |
| Type | Non-ionic polymer |
| Flash point (closed cup) | ＞150 °C |
| Toxicity classification | Low toxicity, non-hazardous |
| Acute toxicity LD50 (oral, rat) | ＞2 000 mg/kg |
| Storage temperature | Recommended 5–35 °C |
| Recommended storage period | 24 months from production date |
Preventive measures: Store the product strictly according to storage conditions (cool, dry, well-ventilated, away from fire sources, heat sources, and strong oxidizers). Seal the container promptly after each use to prevent moisture absorption. Establish product batch usage records for traceability, and prioritize using earlier batches before the storage period expires.
Formulation development stage: When developing new applications or formulations, it is recommended to conduct small-scale tests first to verify the compatibility of PPG-200 with other components and the desired effect before scaling up. Guoli Chemical can provide samples and application guidance.