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CSMS 5237407·Trade policy·August 25, 2025·View on csms.cbp.gov ↗

Creation of third-country case number for sol gel alumina-based ceramic abrasive grains from the People's Republic of China (A-570-190) assembled in Germany (A-428-190)

Plain-English explanation

CSMS 5237407 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (trade policy), published on August 25, 2025. It carries the official CBP guidance brokers and importers must follow for the topic — "Creation of third-country case number for sol gel alumina-based ceramic abrasive grains from the People's Republic of China (A-570-190) assembled in Germany (A-428-190)". It links to 2 AD/CVD cases in Tandom's catalog. CSMS messages are the operational layer between Commerce determinations and at-the-border collections: when Commerce publishes a new rate, scope ruling, or instruction, CBP turns it into a CSMS that ACE/ACS systems and brokers act on.

Linked AD/CVD cases(2)

Cases referenced or affected by this CSMS message

A-428-190A-570-190

Message body

Full text as published by U.S. Customs and Border Protection

This is an informational message. No action is required. 1. AD/CVD orders generally cover products from a particular country. In some cases, however, products from the country subject to the AD/CVD order may undergo completion or assembly in a third country prior to export or sale to the United States. The products may remain subject to the AD/CVD order despite the completion or assembly that occurs in the third country. However, for CBP purposes, the country of origin for such products may be the third country where the completion or assembly occurred. For technical reasons, the country of the AD/CVD case number must match the CBP country of origin in the entry summary documentation. Accordingly, Commerce establishes third country AD/CVD case numbers that match the CBP country of origin for CBP purposes. 2. The merchandise covered by this investigation is sol gel alumina-based ceramic abrasive grains which are comprised of minimum 94% aluminum oxide (Al2O3), and may contain other compounds, including, but not limited to, titanium dioxide, silicon dioxide, calcium oxide, sodium superoxide, ferric oxide, magnesium oxide, di-aluminum magnesium tetroxide, lanthanum oxide, lanthanum magnesium oxide, zirconium dioxide, or zirconium carbonate. Grain sizes of sol gel alumina-based ceramic abrasive grains range from 0.85 mm to 0.0395 mm (which corresponds to American National Standards Institute (ANSI) grit sizes from 20 to 280). Shapes include but are not limited to angular, sharp, extra sharp, blocky, splintery, round stripped, triangular or shaped like extruded rods or stars. Ceramic abrasive grains have unique crystalline structures that impart certain advanced properties, such as their extreme hardness and strength ranging between 16 and 22 gigapascals by the Vickers Diamond Indent Method, high melting point (2050 °C), and a single- or multi-phase microstructure, which may contain multiple phases, having crystalline sizes ranging from 0.05 to 30µm. These ceramic abrasive grains include but are not limited to blue, white, white-translucent, or off-white opaque colors. Sol gel alumina-based ceramic abrasive grains are covered by the scope of this investigation, whether or not incorporated into downstream articles, including but not limited to, abrasive papers, grinding wheels, grinding cylinders, and grinding discs. When incorporated into downstream articles, only the sol gel alumina-based ceramic abrasive grains component of such articles is covered by the product scope, and not the downstream product as a whole. The merchandise subject to this investigation is properly classified under subheadings 2818.10.2010 and 2818.10.2090 of the Harmonized Tariff Schedule of the United States (HTSUS). Other merchandise subject to the current scope, including when incorporated into the abovementioned downstream articles, may be classified under HTSUS subheadings 2818.10.1000, 2818.20.0000, 2818.30.0000, 3824.99.1100, 3824.99.1900, 6805.10.0000, 6805.20.0000, 6805.30.1000, 6805.30.5000, 6804.22.1000, 6804.22.4000, 6804.22.6000, 8204.12.0000, 8474.90.0010, 8474.90.0020, 8474.90.0050, and 8474.90.0090. Although the HTSUS statistical reporting numbers are provided for convenience and customs purposes, the written description of the merchandise is dispositive. 3. Effective 06/02/2025, Commerce established a third-country case number to allow ceramic abrasive grains assembled in Germany to be properly reported as subject to the order on ceramic abrasive grains from China (A-570-190) upon entry. Third Country: Germany Case Number: A-428-190 Producer and/or Exporter: All Others Case Number: A-428-190-000 Cash Deposit Rate: 72.22% The third country AD/CVD case number above has been assigned for CBP purposes. 4. If there are any questions by the importing public regarding this message, please contact the Call Center for the Office of AD/CVD Operations, Enforcement and Compliance, International Trade Administration, U.S. Department of Commerce at (202) 482-0984. CBP ports should submit their inquiries through authorized CBP channels only. (This message was generated by OVII:TC). 5. There are no restrictions on the release of this information. Alexander Amdur

Frequently asked questions

What is CSMS 5237407?

CSMS 5237407 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Creation of third-country case number for sol gel alumina-based ceramic abrasive grains from the People's Republic of China (A-570-190) assembled in Germany (A-428-190)". CSMS bulletins are the operational instructions CBP issues to brokers, importers, and ACE filers covering rate changes, system updates, scope guidance, and other day-to-day customs-operations changes.

When was CSMS 5237407 published?

CBP published CSMS 5237407 on August 25, 2025. The bulletin's instructions are typically operative as of the publication date unless the body specifies a different effective date.

Which AD/CVD cases does CSMS 5237407 affect?

CSMS 5237407 references 2 AD/CVD cases (A-428-190, A-570-190). The links on this page take you to each linked order with its current scope, rates, and history.

Is the CBP CSMS the legally binding instruction?

Yes — for at-the-border filing and entry collection. CSMS messages translate Commerce's Federal Register determinations into operational CBP instructions that ACE/ACS systems and brokers execute. The Federal Register notice is the underlying legal authority; the CSMS is the operational implementation. Both should be read together when reconciling a rate or scope change.

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