Minor Metals in the Periodic Table

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183.85

W - Tungsten (Wolfram) (Ammonium Paratungstate (APT))

Origin

In Seller's Option

Tariff No.

2841 8010

Quality

WO₃ (Tungsten Trioxide)	88.5	% min.
Al	10	ppm max.
As	5	ppm max.
Bi	5	ppm max.
Ca	10	ppm max.
Cd	5	ppm max.
Co	5	ppm max.
Cr	5	ppm max.
Cu	5	ppm max.
Fe	10	ppm max.
K	10	ppm max.
Mn	10	ppm max.
Mg	10	ppm max.
Mo	20	ppm max.
Na	10	ppm max.
Ni	5	ppm max.
P	10	ppm max.
Pb	5	ppm max.
S	10	ppm max.
Sb	5	ppm max.
Si	10	ppm max.
Sn	5	ppm max.
Ti	5	ppm max.
V	5	ppm max.

Form

White finely divided free-flowing crystals

Packaging

Packed in polythene-lined iron drums, of uniform net weight per lot, each 100 or 200 KG net.

Lot Size & Tolerance

Minimum 1 Full Container Load = 18 MT (+/- 2 %)

Documentation

Standard documentation, as per MMTA Consolidated Regulations, plus detailed packing list and producer’s original, or photocopy of, producer’s quality certificate.

Weighing & Sampling

As per MMTA Consolidated Regulations.

Other Notes

APT is priced in $/MTU (metric ton unit), or less often in $/STU (short ton unit). 1 MTU of APT contains 10 kgs of WO3.
Using atomic weights: W = 184, O3 = 48, WO3 = 232, W portion = 184/232 = 79.31%.
79.31% of 10 kgs = 7.931 kgs W.

Tungsten (Wolfram) Metal Norms

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REACH Consortia

Consortia website is: www.tungstenconsortium.com

International Tungsten Industry Association (ITIA),
4 Heathfield Terrace, London, W4 4JE, UK. Tel: +44 20 8996 2221, Fax: +44 20 8994 8728
info@itia.info, www.itia.info

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