HazMat Tool — substance information

Phenyl phosphorus dichloride

HMT 15 June 2026
Reference only — HMT snapshot for inspection and audit support; not a shipping paper, placard mandate, or CVI record. Use Print / PDF below for field notes.
UN / ID
UN 2798
Hazard class
8
Packing group
II
ERG guide
ERG 137
Special provisions
SP B2, SP B15, SP IB2, SP T7, SP TP2
Source
49 CFR §172 (15 June 2026)

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Phenyl phosphorus dichloride


In organic chemistry, the phenyl group, or phenyl ring, is a cyclic group of atoms with the formula C6H5−, and is often represented by the pseudoelement symbol Ph (archaically φ) or Ø. The phenyl group is closely related to benzene and can be viewed as a benzene ring, minus a hydrogen atom, which may be replaced by some other element or compound to serve as a functional group. A phenyl group has six carbon atoms bonded together in a hexagonal planar ring, five of which are bonded to individual hydrogen atoms, with the remaining carbon bonded to a substituent. Phenyl groups are commonplace in organic chemistry Wikipedia

Substance Data

Source: PubChem

CAS-Number

644-97-3

Flash Point

n/a

Boiling Point

n/a

Emergency Response Guide No. 137

Hazardous Materials Table

Source: 49 CFR §172 (15 June 2026)

(3) Hazard Class

8
Corrosive liquids

(4) Identification number Help

UN 2798

(5) Packing Group Help

II

(6) Labels Help

Corrosive liquids (8) Cargo Aircraft Only (Cargo Aircraft Only)

(7) Special Provisions (§172.102) Help

×Note:
Special provisions may be very complex. The extracts are taken from 49 CFR §172.102. Please be careful with the information, as necessary, additional conditions may be applied that are not written here. Please check the original source and report bugs.
B2
B15
IB2
T7
TP2

(8) Packing Authorizations (§173.***) Help

(8A) Exceptions154see 49 CFR §173.154
(8B) Non-bulk202see 49 CFR §173.202
(8C) Bulk242see 49 CFR §173.242

(9) Quantity Limits Help

(9A) Passenger aircraft/railForbidden
(9B) Cargo aircraft only30 L

(10) Vessel stowage Help

(10A) Location
(10B) Other

Segregation chart for load, transport, and storage

This chart shows whether loading, transport, or storage with other hazard classes is permitted, prohibited, or restricted. Based on 49 CFR §177.848.

Prohibited Must not be loaded, transported, or stored together in the same vehicle or facility.
Permitted May be loaded, transported, or stored together.
Restricted May be loaded, transported, or stored together only with restrictions.

Similar substances

UN / IDProper shipping nameHazard class
UN 1381Phosphorus, white dry or Phosphorus, white, under water or Phosphorus white, in solution or Phosphorus, yellow dry or Phosphorus, yellow, under water or Phosphorus, yellow, in solution4.2
NA 1955Organic phosphate, mixed with compressed gas or Organic phosphate compound, mixed with compressed gas or Organic phosphorus compound, mixed with compressed gas2.3
UN 3017Organophosphorus pesticides, liquid, toxic, flammable, flash point not less than 23 degrees C6.1
UN 2784Organophosphorus pesticides, liquid, flammable, toxic, flash point less than 23 degrees C3
UN 0243Ammunition, incendiary, white phosphorus, with burster, expelling charge or propelling charge1.2H
UN 0244Ammunition, incendiary, white phosphorus, with burster, expelling charge or propelling charge1.3H
Ammunition, smoke (water-activated contrivances), without white phosphorus or phosphides, with burster, expelling charge or propelling charge, see Contrivances, water-activated, etc. (UN 0249)
UN 0245Ammunition smoke, white phosphorus with burster, expelling charge, or propelling charge1.2H
UN 0246Ammunition, smoke, white phosphorus with burster, expelling charge, or propelling charge1.3H
Ammunition, smoke (water-activated contrivances), white phosphorus, with burster, expelling charge or propelling charge, see Contrivances, water-activated, etc. (UN 0248)
Phosphorus (white or red) and a chlorate, mixtures ofForbidden
UN 1339Phosphorus heptasulfide, free from yellow or white phosphorus4.1
UN 1340Phosphorus pentasulfide, free from yellow or white phosphorus4.3
UN 1341Phosphorus sesquisulfide, free from yellow or white phosphorus4.1
UN 1343Phosphorus trisulfide, free from yellow or white phosphorus4.1