AFMAN 24-204(I)/TM 38-250/NAVSUP PUB 505/MCO P4030.19H/ DLAI 4145.3
11 DECEMBER 2001
point of 38 degrees C (100 degrees F) and a flash point of 25 degrees C (77 degrees F) would be assigned a PG III.
If the initial boiling point is less than or equal to 35 degrees C (95 degrees F), assign PG I. Viscous Class 3 material
(i.e., paints, varnishes, enamels, lacquers, adhesives, and polishes) in PG II with a flash point of less than 23
degrees C (73 degrees F) may be grouped in PG III provided the requirements of 49 CFR 173.121(b) are met.
Figure A4.3. Criteria for Class 3 PG.
Flash Point (closed-cup)
Initial Boiling Point
less than or equal to 35 C (95 F)
less than 23 C (73 F)
greater than 35 C (95 F)
equal to or greater than 23 C (73 F) but less than or
equal to 60.5 C (141 F)
greater than 35 C (95 F)
A4.4.3 Class 4 Packing Groups. When table A4.1 indicates that the PG of the material is to be determined on the
basis of test criteria for Class 4 material, the test methods and appropriate criteria must comply with 49 CFR,
appendix E to part 173.
A4.4.4. Class 5 Packing Groups. When column 5 of table A4.1 is blank for a solid in Class 5.1, determine the PG
based on the test criteria found in 49 CFR, part 173, appendix F. If column 5 is blank for a liquid in Class 5.1,
packing groups can be assigned by a comparison to existing entries in table A4.1.
A4.4.5. Class 6 Packing Groups and Hazard Zone. When table A4.1, column 5 provides more than one PG and
hazard zone for a specific Class 6.1 material, determine the PG and hazard zone by applying the following criteria:
Determine the PG assignment for other than inhalation of vapors by using figure A4.4.
Figure A4.4. PG Assignment For Other Than Inhalation of Vapors.
Oral Toxicity LD50(mg/kg)
Inhalation Toxicity by
dusts and mists
> 5, < 50
solids: > 50, <200, liquids > 50, <500
> 2, <10
Determine the PG and hazard zone assignments for inhalation of vapors by using figure A4.5.
Figure A4.5. Inhalation Toxicity.
PG (Hazard Zone)
Vapor Concentration and Toxicity
I (Hazard Zone A)
V >500 LC50 and LC50 < 200 mL/m3
I (Hazard Zone B)
V >10 LC50 and LC50 <1000 mL/m3 , and the criteria for PG I, hazard
zone A are not met
II (Hazard Zone C)
V >LC50 and LC50 <3000 mL/m3, and the criteria for PG I, hazard
zones A and B are not met
III (Hazard Zone D)
V >.2 LC50 and LC
5000 mL/m3, and the criteria for packing
groups I and II, hazard zones A, B, and C are not met
"V" is the saturated vapor concentration in air of the material in mL/m3 at 20 degrees C (68 degrees F) and
standard atmospheric pressure.
When the PG determined by figure A4.5 and figure A4.6 is different for two or more (oral, dermal,
inhalation) requirements, the PG assigned to the material is the highest degree of toxicity identified.
Compute the PG and hazard zone for Class 6.1 mixtures that are poisonous (toxic) by inhalation as
identified in 49 CFR 173.133 (b).
A4.4.6. Class 8 Packing Groups. When table A4.1 lists more than one PG for a material, determine the PG
according to 49 CFR 173.137.