# Ferroatlantica — Hazardous Materials Safety Interpretation

**Citation:** 06-0055  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2006-04-20

06-0055 response to Ferroatlantica concerning 173.22.

## Document text

<<<PAGE 1>>>

J.S. Department
of Transportatior
400 Seventh Street, S.W.
Washington, D.C. 20590
Pipeline and
Administration
Hazardous Materials Safety
APR 20 2006
Mr. Edward Hopkins
Ref. No. 06-0055
Ferroatlantica
60 Public Square
Suite 350
Medina, OH 44256
Dear Mr. Hopkins:
This is in response to your February 13, 2006 letter requesting clarification on the
applicability of the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) to
ferrosilicon containing 75% silicon. Specifically, you request confirmation from this
office that the test report submitted with your letter provides sufficient verification that
the tested materials are not subject to the requirements of the HMR.
As provided in § 173.22, it is the shipper's responsibility to properly classify a hazardous
material. Such determinations are not required to be verified by this office. However,
based on the test results you provided, it is our opinion that your ferrosilicon containing
75 percent silicon does not meet the definition of a Division 4.3 material and, provided it
does not meet the criteria for another hazard class, it is not subject to the HMR.
I hope this information is helpful. Please contact us if you require additional assistance.
Sincerely,
John A. Gale
Chief, Standards Development
Office of Hazardous Materials Standards
WITHIN
173:22
060055

<<<PAGE 2>>>

Eichenaub
$172.101(f)
FERROAȚLANTIÇA
North America
$173.22
$173.124
4:05
Shipper's Responsibility
06-0055
February 13, 2006
Associate Administrator for Hazardous Materials Safety
Research and Special Programs Administration
400 7* Street, S.W.
U.S. Department of Transportation
Washington, DC 20590-001
Attention: DHM-31
To The Office of Hazardous Materials Standards:
On behalf of Ferroatlantica I am requesting a permanent exemption to Hazardous Materials
Regulations (HMR; 49 CFR Parts 171-180) for ferrosilicon with 75 percent silicon. Please find
included with this request the spontaneous ignition test results as performed under UN Manual of
Tests and Criteria 173.124 (dangerous when wet material).
This request is being made for the transportation of the subject material by both covered bulk
dump truck and packaged material by covered flatbed truck for which we will act as the shipper.
I represent that I am a resident of the United States and should you have any questions or
concerns regarding this request, I can be reached at:
Ferroatlantica
60 Public Square, Suite 350
Medina, Ohio 44256
Ph. (330) 764-3500
Fax. (330) 764-3550
Thank you in advance for addressing our request.
Sincerely,
Glend Halina
Edward Hopkins
General Manager
Ferroatlantica
60 Public Square, Suite 350
Tel: 1 330 764 3500
Medina, Ohio 44256 - USA
Fax: 1 330 764 3550

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2006/060055.pdf>
- Source ID: `phmsa`
- SHA-256: `4c26384ebb06570e25b52dc0cd455fc84c9152fc37c8b540e3f45e5f089987a5`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T23:36:51.338Z
- Document slug: `phmsa-interpretation-06-0055`

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