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Studies were performed according to UN Transport of Dangerous Goods Recommendations, Fourth Revised Edition (Class 8, Packing 8, Packing group III, test C1) on corrosivity to metals; and according to UN Recommendation on the Transportation of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.3, on the emission of flammable gases on contact with water were conducted.
The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days; however the maximum pit depth on the aluminium coupons was > 120 μm. The saturation solution of diboron trioxide was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III (according to the UN Transport of Dangerous Goods Recommendations). There were no flammable gases on contact with water.
Studies on dustiness were performed according to CIPAC method MT 171 and showed that diboron trioxide (boric oxide ABA 60 mesh) and boron oxide (ETI) were dust category 1 - nearly dust free and diboron trioxide (Boric oxide 200 mesh) was dust category 3 – dusty.

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Studies were performed according to UN Transport of Dangerous Goods Recommendations, Fourth Revised Edition (Class 8, Packing 8, Packing group III, test C1) on corrosivity to metals; and according to UN Recommendation on the Transportation of Dangerous Goods, Manual of Tests and Criteria for substances of Class 4, Division 4.3, on the emission of flammable gases on contact with water were conducted.

 

The percentage mass losses on steel and aluminium were found to be < 13.5 % over 7 days; however the maximum pit depth on the aluminium coupons was > 120 μm. The saturation solution of diboron trioxide was therefore a candidate for classification as a corrosive substance of UN Class 8, Packing group III (according to the UN Transport of Dangerous Goods Recommendations). There were no flammable gases on contact with water.

Studies on dustiness were performed according to CIPAC method MT 171 and showed that diboron trioxide (boric oxide ABA 60 mesh) which has a particle size (d50 mm) of 0.051, and boron oxide (ETI) which has a particles size (d50 mm) of 0.44, were dust category 1 - nearly dust free. This sample represents the most representative of those placed on the market. Diboron trioxide (Boric oxide 200 mesh) which has a particles size (d50 mm) of 0.044 was dust category 3 – dusty. This sample represents the finest grade placed on the market.