1.1This specification covers volumetric flasks and four types of centrifuge tubes, widely used in microchemistry.

Note 1-Specifications for several items listed below were developed by the Committee on Microchemical Apparatus, Division of Analytical Chemistry, American Chemical Society.²

1.2Product with a stated capacity not listed in this standard may be specified Class A tolerance when product conforms to the tolerance range of the next smaller volumetric standard product listed in Table 1.

TABLE 1 Volumetric Flask (see Fig. 1)

Style	Capacity, mL	Class A/ Tolerance, ± mL	A, ID, max/mm	B, ID, ref/mm	C, max/mm	D, max/mm	Stopper No.
I	1	0.010	5.3	8.25	70	100	8
II	1	0.010	5.3	-	95	125	8
I	2	0.015	6.4	10.75	70	100	8
I	3	0.015	6.4	13.50	72	100	8
I	4	0.020	7.3	14.00	75	100	8
I	5	0.020	7.3	15.75	75	100	8
I	10	0.020	8.25	18.00	110	135	9
I	25	0.030	8.7	26.00	140	165	9