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Bitumens. Determination of neutralization value by colour indicator titration

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Phthalic anhydride for industrial use. Method for the determination of impurities oxidirable in the cold by potassium permanganate

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Petroleum insulating bitumens. Specifications

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Sodium cyanide technical. Specifications

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Perchloroethylene. Test method for stability at contact with copper

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Reagents. Potassium pyrosulphate

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