---
kind: "section"
citation: "49 C.F.R. § 172.330"
title: "49"
number: "172.330"
heading: "Tank cars and multi-unit tank car tanks."
url: "https://uscodex.org/cfr/49/172.330"
---

# §172.330. Tank cars and multi-unit tank car tanks.

- (a) **Shipping name and identification number.** No person may offer for transportation or transport a hazardous material—
  - (1) **In a tank car unless the following conditions are met—**
    - (i) The tank car must be marked on each side and each end as required by [§ 172.302](/cfr/49/172.302.md) with the identification number specified for the material in the [§ 172.101](/cfr/49/172.101.md) table; and
    - (ii) A tank car containing any of the following materials must be marked on each side with the key words of the proper shipping name specified for the material in the [§ 172.101](/cfr/49/172.101.md) table, or with a common name authorized for the material in this subchapter (e.g., “Refrigerant Gas”):
  - (2) In a multi-unit tank car tank, unless the tank is marked on two opposing sides, in letters and numerals no less than 50 mm (2.0 inches) high—
    - (i) With the proper shipping name specified for the material in the [§ 172.101](/cfr/49/172.101.md) table or with a common name authorized for the material in this subchapter (e.g., “Refrigerant Gas”); and
    - (ii) With the identification number specified for the material in the [§ 172.101](/cfr/49/172.101.md) table, unless marked in accordance with §§ [172.302(a)](/cfr/49/172.302.md?p=a) and [172.332](/cfr/49/172.332.md) of this subpart.
- (b) A motor vehicle or rail car used to transport a multi-unit tank car tank containing a hazardous material must be marked on each side and each end, as required by [§ 172.332](/cfr/49/172.332.md), with the identification number specified for the material in the [§ 172.101](/cfr/49/172.101.md) table.
- (c) No person may offer for transportation or transport a tank car or multi-unit tank car tank containing unodorized liquefied petroleum gas (LPG) unless it is legibly marked NON-ODORIZED or NOT ODORIZED on two opposing sides near the marked proper shipping name required by paragraphs [(a)(1)](#a-1) and [(2)](#a-2) of this section, or near the placards. The NON-ODORIZED or NOT ODORIZED marking may appear on a tank car or multi-unit tank car tank used for both unodorized and odorized LPG.

## Notes

### Amendments

[Amdt. 172-123, 55 FR 52593, Dec. 21, 1990, as amended at 56 FR 66255, Dec. 20, 1991; 57 FR 45458, Oct. 1, 1992; Amdt. 172-148, 61 FR 28676, June 5, 1996; Amdt. 172-148, 61 FR 50254, Sept. 25, 1996; 66 FR 33425, June 21, 2001; 69 FR 64471, Nov. 4, 2004; 81 FR 35540, June 2, 2016; 85 FR 83380, Dec. 21, 2020]

### Authority

Authority: 49 U.S.C. 5101-5128, 44701; 49 CFR 1.81, 1.96 and 1.97.

### Source

Source: Amdt. 172-29, 41 FR 15996, Apr. 15, 1976, unless otherwise noted.

### Amendments

[Amdt. 172-123, 55 FR 52593, Dec. 21, 1990, as amended at 56 FR 66255, Dec. 20, 1991; 57 FR 45458, Oct. 1, 1992; Amdt. 172-148, 61 FR 28676, June 5, 1996; Amdt. 172-148, 61 FR 50254, Sept. 25, 1996; 66 FR 33425, June 21, 2001; 69 FR 64471, Nov. 4, 2004; 81 FR 35540, June 2, 2016; 85 FR 83380, Dec. 21, 2020]