Vinyl Acetate Monomer EVA Grade HQ 15-20 · inhibitor 15-20 ppm
Sized for copolymer plants on ocean freight where an inbound lot may wait most of a quarter before it is charged. It is the higher-band counterpart to the mid-band copolymer grade: the same product specification, a different logistics radius, and a stock policy built around a voyage plus a production queue. The practical boundary between the two is whether a plant can consume a delivery within a few weeks.
Typical values, not for specification. Batch certificate governs delivery.
| VA purity | 99.9 wt% min (typical) |
|---|---|
| Water | 200 ppm max (typical) |
| Chemical name | Vinyl Acetate Monomer (VAM) |
| CAS / EINECS | 108-05-4 / 203-545-4 |
| Formula / MW | C4H6O2 / 86.09 |
| Appearance | Clear, colourless liquid, free of suspended matter |
| Acidity as acetic acid | ≤ 50 ppm (typical) |
| Acetaldehyde | ≤ 50 ppm (typical) |
| Methyl acetate | ≤ 50 ppm (typical) |
| Ethyl acetate | ≤ 250 ppm (typical) |
| Colour | ≤ 5 Pt-Co (typical) |
| Distillation range @760 mmHg | 72.3 – 73.1 °C |
| Density @20/20 °C | 0.9320 – 0.9345 g/cm³ |
|---|---|
| Boiling point | 72.7 °C |
| Melting point | − 93.2 °C |
| Flash point (closed cup) | − 8 °C |
| Autoignition temperature | 385 – 427 °C (source dependent) |
| Explosive limits in air | 2.6 – 13.4 vol% |
| Vapour pressure @20 °C | 11.7 kPa |
| Vapour density (air = 1) | 3.0 |
| Solubility in water @20 °C | ≈ 2 g/100 mL |
| Refractive index n20/D | 1.395 |
| Inhibitor (hydroquinone, HQ) | 15-20 ppm |
| Storage stability | Depends on temperature, oxygen availability and inhibitor consumption; periodic HQ and polymer re-test recommended |
When the sea leg is longer than the production cycle, planning replaces reactivity as the main risk. This section covers cover levels, arrival testing and the boundary against the mid-band grade.
Set minimum cover at one full voyage plus a stated margin, and review it whenever a schedule changes. Cover below one voyage means the plant is relying on the sea being punctual, which is not a supply policy.
Test at discharge and again before charging. The interval between the two is the plant storage period, and it is the only segment of the journey where a result can still change a decision.
Use this band when the plant cannot consume a delivery within a few weeks; use the mid-band grade when it can. Choosing between them on price rather than on turnover is how a plant ends up storing material it should have been running.
Stainless steel or aluminium only. Confirm the headspace practice against documented supplier guidance instead of assuming a nitrogen blanket is protective.
Keep the inland leg short and shaded. The sea leg is planned; the inland leg is usually the part that sits unsupervised in a container yard.
Reserve tank capacity before the vessel sails rather than after it berths. Capacity confirmed late is capacity that leaves a container waiting on the quay.
Watch water and acidity at the feed point alongside the inhibitor figure, since a long storage period is when small water pickup becomes visible.
Stainless steel or aluminium, no copper or zinc, no rusted fittings. Ventilate the area, bond and earth on transfer and keep ignition sources away from the vapour zone.
Each route below links to the application map for the full grade set.
Continuous trains on quarterly inbound cover
Film plants with sea-fed supply
Adhesive copolymers with long inbound routes
Compounds produced on a steady calendar
Every export lot ships with a batch certificate of analysis.
Compare the inhibitor band, storage window and delivery form side by side.
Technical, knowledge and commercial notes written for this product line.
Send your required volume, delivery form and site for Celanese VAM EVA Grade HQ 15-20; we reply with the matching grade, the batch documentation and the shipping window.
+8615380400285
sales2@liwei-chem.com
+8615380400285
Fred Wang
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