Packing group | Flash point (closed-cup) | Initial boiling point |
I | [LESS THAN EQUAL TO]35 °C (95 °F) | |
II | <23 °C (73 °F) | >35 °C (95 °F) |
III | [GREATER THAN EQUAL TO]23 °C, [LESS THAN EQUAL TO]60 °C ([GREATER THAN EQUAL TO]73 °F, [LESS THAN EQUAL TO]140 °F) | >35 °C (95 °F) |
1Viscosity determination: Where the substance concerned is non-Newtonian, or where a flow-cup method of viscosity determination is otherwise unsuitable, a variable shear-rate viscometer shall be used to determine the dynamic viscosity coefficient of the substance, at 23 °C (73.4 °F), at a number of shear rates. The values obtained are plotted against shear rate and then extrapolated to zero shear rate. The dynamic viscosity thus obtained, divided by the density, gives the apparent kinematic viscosity at near-zero shear rate.
Kinematic viscosity (extrapolated) [NU] (at near-zero shear rate) mm2/s at 23 °C (73.4 °F) | Flow-time t in seconds | Jet diameter in mm | Flash point c.c. |
20 < [NU] [LESS THAN EQUAL TO] 80 | 20 < t [LESS THAN EQUAL TO] 60 | 4 | above 17 °C (62.6 °F). |
80 < [NU] [LESS THAN EQUAL TO] 135 | 60 < t [LESS THAN EQUAL TO] 100 | 4 | above 10 °C (50 °F). |
135 < [NU] [LESS THAN EQUAL TO] 220 | 20 < t [LESS THAN EQUAL TO] 32 | 6 | above 5 °C (41 °F). |
220 < [NU] [LESS THAN EQUAL TO] 300 | 32 < t [LESS THAN EQUAL TO] 44 | 6 | above -1 °C (31.2 °F). |
300 < [NU] [LESS THAN EQUAL TO] 700 | 44 < t [LESS THAN EQUAL TO] 100 | 6 | above -5 °C (23 °F). |
700 < [NU] | 100 < t | 6 | No limit. |
49 C.F.R. § 173.121