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Lactose or glucose or similar materials, may be used as a phlegmatizer provided that the

substance contains not less than 90%, by mass, of phlegmatizer. The competent authority may

authorize these mixtures to be classified in Class 4.1 on the basis of a test Series 6(c) of

Section 16 of Part I of the Manual of Tests and Criteria on at least three packages as prepared

for carriage. Mixtures containing at least 98%, by mass, of phlegmatizer are not subject to the

requirements of ADR. Packages containing mixtures with not less than 90%, by mass, of

phlegmatizer need not bear a label conforming to model No. 6.1.