33 CFR § 151.49 - Category C and D Oil-like NLSs allowed for carriage.

---
identifier: "/us/cfr/t33/s151.49"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 151.49 - Category C and D Oil-like NLSs allowed for carriage."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "151.49"
section_name: "Category C and D Oil-like NLSs allowed for carriage."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "O"
subchapter_name: "POLLUTION"
part_number: "151"
part_name: "VESSELS CARRYING OIL, NOXIOUS LIQUID SUBSTANCES, GARBAGE, MUNICIPAL OR COMMERCIAL WASTE, AND BALLAST WATER"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1902, 1903, 1908; 46 U.S.C. 6101; 46 U.S.C. 70034; Pub. L. 104-227, 110 Stat. 3034; sec. 623, Pub. L. 108-293, 118 Stat. 1063; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; DHS Delegation No. 00170.1, Revision No. 01.4."
cfr_part: "151"
---


# 151.49 Category C and D Oil-like NLSs allowed for carriage.

The following is a list of Category C and D Oil-like NLSs that the Coast Guard allows to be carried:

(a) The following Category C oil-like NLSs may be carried:

Aviation alkylates

Cycloheptane

Cyclohexane

Cyclopentane

p-Cymene

Ethylcyclohexane

Heptane (all isomers)

Heptene (all isomers)

Hexane (all isomers)

Hexene (all isomers)

iso-Propylcyclohexane

Methyl cyclohexane

2-Methyl-1-pentene, *see* Hexene (all isomers)

Nonane (all isomers)

Octane (all isomers)

Olefin mixtures (C5-C7)

Pentane (all isomers)

Pentene (all isomers)

1-Phenyl-1-xylylethane

Propylene dimer

Tetrahydronaphthalene

Toluene

Xylenes

(b) [Reserved]

[CGD 85-010, 52 FR 7759, Mar. 12, 1987, as amended by CGD 88-100a, 54 FR 40001, Sept. 29, 1989; 55 FR 17269, Apr. 24, 1990; CGD 92-100a, 59 FR 16987, Apr. 11, 1994; CGD 94-901, 59 FR 45148, Aug. 31, 1994; CGD 95-901, 60 FR 34039, June 29, 1995; USCG 2000-7079, 65 FR 67157, Nov. 8, 2000; USCG-2008-0179, 73 FR 35014, June 19, 2008]