48 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. PG Flash Point (closed-cup) Initial Boiling Point I less than or equal to 35 C (95 F) II less than 23 C (73 F) greater than 35 C (95 F) III 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. PG Oral Toxicity LD50(mg/kg) Dermal Toxicity LD50(mg/kg) LC50 mg/L) Inhalation Toxicity by dusts and mists   I < 5 <40 <0.5 II > 5, < 50 >40, <200 <0.5, <2 III solids: > 50, <200, liquids > 50, <500 >200, <1000 > 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 50 < 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.