Vinyl Acetate Monomer HQ 15-20 · inhibitor 15-20 ppm
Built for buyers whose material sits in a warehouse for a quarter or more before it is charged, typically a regional stock point or a construction chemical plant with a long production calendar. The band is sized so that the answer to how long it has been stored is a matter of record rather than a guess.
Typical values, not for specification. Batch certificate governs delivery.
| 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 |
| VA purity | ≥ 99.9 wt% (typical) |
| Water | ≤ 200 ppm (0.02 wt%, typical) |
| 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 |
Material that stays put needs a schedule, not a memory. This section covers the re-test interval, the stacking rules and the point at which a lot stops being stock and becomes a decision.
Set a re-test interval tied to storage temperature and a second trigger tied to elapsed time. Two triggers catch both the slow drift of a cool store and the faster drift of a warm one, which a single calendar rule cannot do.
Stack drums no higher than the handling plan supports and keep labels, closures and lot numbers readable from the aisle. A stack that must be dismantled to read a lot number is a stack that will be sampled late.
Keep stored goods away from roof glazing and roller doors that face the afternoon sun. The temperature difference between a shaded aisle and the top of a stack under glass is larger than most store keepers expect.
Rotate stock by lot date and mark each delivery with its arrival week. Physical rotation is the cheapest control available and needs no instrument to work.
Write the withdrawal rule in advance: what result allows use, what requires investigation and what removes the lot. A rule agreed while the store is calm is followed when it is not.
Stainless steel or aluminium only. Confirm the headspace practice against documented supplier guidance instead of assuming a nitrogen blanket is protective.
Keep the store shaded, dry and ventilated, with no ignition sources and no oxidiser storage in the same bay. Segregation is a layout decision, not a label on a drum.
Inspect closures and bungs on arrival and during each stock check. A weeping bung is a slow leak of both product and inhibitor protection, and it is invisible from the aisle side of a pallet.
Sample from the drum that will be charged, not from a reference drum kept aside. A retained sample describes the lot as delivered, not the drum in service.
Log every move between bays. Movement is the moment a drum is most likely to be damaged, and a move record explains damage that would otherwise look like a supplier fault.
Each route below links to the application map for the full grade set.
Redispersible powder and tile adhesive plants
Regional stores serving several small lines
Seasonal binder demand held in stock
Coating kitchens with quarterly buying
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 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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