Tandom
About
Sign inCreate a free account →
Tandom

The building blocks of global trade.

hello@tandom.ai

Proud to partner with

Microsoft for Startups

NVIDIA

Inception Program

Products

  • Tariff Calculator
  • AD/CVD Intelligence
  • HTS Classification
  • Document Intelligence
  • Entry Filing
  • Excel Plugin
  • Email Plugin

Catalogs

  • AD/CVD Catalog
  • HTS Catalog
  • Pending Investigations Directory
  • Rate Change Feed

Developers

  • API
  • AI Agent Workflows
  • MCP Connector
  • API Reference
  • API Pricing
  • API Changelog

Resources

  • Resource Center
  • Guides
  • Roadmap

Company & Legal

  • About
  • Privacy Policy
  • Terms of Service
  • Acceptable Use

© 2026 Fintora Technologies, Inc. d/b/a Tandom. All rights reserved.

Plain-English explanationLinked AD/CVD casesMessage bodyFrequently asked questionsLearn more
  1. AD/CVD Catalog
  2. ›
  3. CSMS
  4. ›
  5. CSMS 4263416
CSMS 4263416·Trade policy·September 19, 2024·View on csms.cbp.gov ↗

Notice of affirmative preliminary CVD determination, and alignment of the final CVD determination with the AD investigation of 2,4-dichlorophenoxyacetic acid from the People's Republic of China (C-570-161)

Plain-English explanation

CSMS 4263416 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin (trade policy), published on September 19, 2024. It carries the official CBP guidance brokers and importers must follow for the topic — "Notice of affirmative preliminary CVD determination, and alignment of the final CVD determination with the AD investigation of 2,4-dichlorophenoxyacetic acid from the People's Republic of China (C-570-161)". It links to 1 AD/CVD case 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(1)

Cases referenced or affected by this CSMS message

C-570-161

Message body

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

1. On 09/13/2024, Commerce published in the Federal Register its affirmative preliminary determination in the countervailing duty (CVD) investigation of 2,4-dichlorophenoxyacetic acid from the People's Republic of China (subject merchandise) (89 FR 74906). Additionally, Commerce has aligned the deadline for the final determination in the CVD investigation with the deadline for the final determination in the companion antidumping duty investigation of the same merchandise, currently scheduled to be issued no later than 01/21/2025. 2. The merchandise covered by this investigation has changed: The merchandise covered by this investigation is 2,4-dichlorophenoxyacetic acid (2,4-D) and its derivative products, including salt and ester forms of 2,4-D. 2,4-D has the Chemical Abstracts Service (CAS) registry number of 94-75-7 and the chemical formula C8H6 Cl2O3. Salt and ester forms of 2,4-D include 2,4-D sodium salt (CAS 2702-72-9), 2,4-D diethanolamine salt (CAS 5742-19-8), 2,4-D dimethyl amine salt (CAS 2008-39-1), 2,4-D isopropylamine salt (CAS 5742-17-6), 2,4-D tri-isopropanolamine salt (CAS 3234180-3), 2,4-D choline salt (CAS 1048373-72-3), 2,4-D butoxyethyl ester (CAS 1929-733), 2,4-D 2-ethylhexylester (CAS 1928-43-4), and 2,4-D isopropylester (CAS 94-11-1). All 2,4-D, as well as the salt and ester forms of 2,4-D, is covered by the scope irrespective of purity, particle size, or physical form. The conversion of a 2,4-D salt or ester from 2,4-D acid, or the formulation of nonsubject merchandise with the subject 2,4-D, its salts, and its esters in the country of manufacture or in a third country does not remove the subject 2,4-D, its salts, or its esters from the scope. For any such formulations, only the 2,4-D, 2,4-D salt, and 2,4-D ester components of the mixture is covered by the scope of the investigation. Formulations of 2,4-D are products that are registered for end-use applications with the Environmental Protection Agency and contain a dispersion agent. The country of origin of any 2,4-D derivative salt or ester is determined by the country in which the underlying 2,4-D acid is produced. 2,4-D, its salts, and its esters are classified under Harmonized Tariff Schedule of the United States (HTSUS) subheading 2918.99.2010. Subject merchandise, including the abovementioned formulations, may also be classified under HTSUS subheadings 2922.12.0001, 2921.11.0000, 2921.19.6195, 2922.19.9690, 3808.93.0500, and 3808.93.1500. The HTSUS subheadings and CAS registry numbers are provided for convenience and customs purposes. The written description of the scope of the investigation is dispositive. 3. This proceeding has been assigned case number C-570-161. 4. Cash Deposits for the companies identified below. CBP shall suspend liquidation of subject merchandise entered, or withdrawn from warehouse, for consumption on or after 09/13/2024 (the date of publication of the preliminary determination), and shall require, for such entries, a cash deposit equal to the percentages of entered value for the producers and/or exporters listed below. Producer and/or Exporter: Jiangxi Tianyu Chemical Co., Ltd. and its cross-owned companies: Thai Harvest Ltd., CAC Nantong Chemical Co., Ltd., and CAC Shanghai International Trading Co., Ltd. Case Number: C-570-161-001 Cash Deposit Rate: 27.68 percent Producer and/or Exporter: Shandong Rainbow Agrosciences Co., Ltd. and its cross-owned companies: Shandong Weifang Rainbow Chemical Co., Ltd., Ningxia Rainbow Chemical Co., Ltd., Shandong Rainbow Investment Co., Ltd., and Shandong Runnong Investment Co., Ltd. Case Number: C-570-161-002 Cash Deposit Rate: 3.10 percent Producer and/or Exporter: All Others Case Number: C-570-161-000 Cash Deposit Rate: 27.34 percent 5. If there are any questions by the 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 OI:CC.) 6. There are no restrictions on the release of this information. Alexander Amdur

Frequently asked questions

What is CSMS 4263416?

CSMS 4263416 is a U.S. Customs and Border Protection (CBP) Cargo Systems Messaging Service bulletin titled "Notice of affirmative preliminary CVD determination, and alignment of the final CVD determination with the AD investigation of 2,4-dichlorophenoxyacetic acid from the People's Republic of China (C-570-161)". 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 4263416 published?

CBP published CSMS 4263416 on September 19, 2024. 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 4263416 affect?

CSMS 4263416 references 1 AD/CVD case (C-570-161). 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.

Learn more

Tandom guides relevant to CBP CSMS messages

Trade compliance APIs in broker workflows

Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.

Open resource →

Find the right manufacturer or exporter rate in an AD/CVD order

Cash deposit cascade, separate rates, all-others, and PRC-wide rates. Worked example on case A-570-910 (galvanized welded steel pipe from China) with three exporter-specific rates.

Open resource →

Determine if a product is in scope of an AD/CVD order

Scope text is authoritative; the HTS list is illustrative. Read scope, find past rulings, and file a 19 CFR 351.225 inquiry. Worked example on case A-570-106 (wooden cabinets from China).

Open resource →

Subscribe to and triage CBP CSMS messages

How to subscribe to CBP Cargo Systems Messaging Service and triage the messages that change broker filing behavior, without losing the ones that matter.

Open resource →

Real-time alerts when a CSMS message changes a duty rate

Set up alerts when a CBP CSMS message changes a duty rate on an HTS code you depend on. Built for brokers, forwarders, and importer compliance teams.

Open resource →

Check AD/CVD exposure by HTS code

A practical workflow for checking antidumping and countervailing duty exposure on a US entry. For brokers and ops teams who need the answer before filing.

Open resource →