Japan-origin dichlorosilane faces 80.8%–99.2% provisional deposits: what MOFCOM’s Announcement No. 37 means for chip-material procurement
- On 7 September 2026 the Ministry of Commerce issued Announcement No. 37 of 2026, giving a preliminary determination that imports of dichlorosilane (DCS) originating in Japan are dumped and are causing substantial injury to the domestic industry, with dumping margins of 80.8% to 99.2%.
2026年9月7日，商务部发布2026年第37号公告，初步认定原产于日本的进口二氯二氢硅存在倾销、国内产业受到实质损害且存在因果关系，倾销幅度为80.8%至99.2%。
- Provisional measures take the form of deposits: from 8 September 2026 importers must post customs deposits at the company-specific rates — Shin-Etsu Chemical 99.2%, Denal Silane 80.8%, and all other Japanese companies 99.2% — calculated on the customs value plus import-stage VAT.
临时措施采用保证金形式：自2026年9月8日起，进口经营者须按公司税率向海关提供保证金——信越化学工业99.2%、德纳尔硅烷80.8%、其他日本公司99.2%——以海关审定的计税价格乘保证金比率再乘（1+进口环节增值税税率）计算。
- The product sits inside tariff line 28539090 and is a key semiconductor wet-process material: DCS is used for thin-film deposition (epitaxial, silicon carbide, silicon nitride, silicon oxide and polysilicon films) in logic, memory, analogue and other chip manufacturing.
被调查产品归在税则号列28539090项下，是芯片制造的关键湿法材料：二氯二氢硅主要用于薄膜沉积工艺（外延膜、碳化硅膜、氮化硅膜、氧化硅膜和多晶硅膜），覆盖逻辑、存储、模拟及其他芯片生产。
- Customs followed on 7 September with Announcement No. 133, requiring importers of goods under 28539090 to declare DCS under the dedicated commodity code 28539090.61 from 8 September 2026, so the provisional measure can be applied at entry.
海关总署9月7日同步发布2026年第133号公告：自2026年9月8日起，进口税则号列28539090项下商品时，”二氯二氢硅”应申报商品编号28539090.61，以便临时反倾销措施在进口环节落地执行。
- Interested parties had 10 days from the announcement to submit written comments; the investigation continues toward a final determination, so the deposit rates are provisional and may change — imports remain lawful, but cash-flow and pricing assumptions have shifted materially.
利害关系方可在公告发布之日起10天内提交书面评论；调查将继续推进至终裁，保证金比率属于临时措施、可能调整——进口仍然合法，但现金流与定价假设已发生实质变化。
- For semiconductor and specialty-chemical buyers in China, the immediate work is supplier due diligence: confirm the origin and producer of each DCS supply, re-price landed costs with the deposit factored in, and check contract clauses on pass-through of provisional trade-remedy charges.
对中国境内的半导体及特种化学品采购方，当务之急是供应商尽调：逐笔确认二氯二氢硅的原产地与生产商、把保证金计入到岸成本重估、并核查合同中临时贸易救济费用的转嫁条款。
Japan-origin dichlorosilane faces 80.8%–99.2% provisional deposits: what MOFCOM’s Announcement No. 37 means for chip-material procurement | 日本产二氯二氢硅面临80.8%–99.2%保证金：商务部37号公告对芯片材料采购的影响
Overview
On 7 September 2026, the Ministry of Commerce (商务部) published Announcement No. 37 of 2026 (商务部公告2026年第37号), the preliminary determination in the anti-dumping investigation on imports of dichlorosilane (DCS, 二氯二氢硅) originating in Japan. The investigation was opened on 7 January 2026 at the application of the domestic industry. The preliminary finding: the Japanese imports are dumped, the domestic DCS industry has suffered substantial injury, and a causal link exists between the two.
Provisional anti-dumping measures took effect the next day. For semiconductor manufacturers, specialty-gas distributors and electronics supply-chain buyers in China, the announcement converts a trade-remedy docket into an immediate procurement-cost and supplier-verification exercise.
The product and why it matters
Dichlorosilane (chemical formula SiH2Cl2) is a colourless, flammable, toxic gas with a distinctive odour, traded at purity above 99%. Its principal use is thin-film deposition in chip manufacturing — epitaxial films, silicon carbide films, silicon nitride films, silicon oxide films and polysilicon films — serving logic, memory, analogue and other chip production. It is also used to synthesise silicon-based precursors and polysilazane.
The investigated product falls under tariff line 28539090; other products under that line are outside the scope. The concentration of DCS in advanced semiconductor process flows is why a materials case of this size draws attention across the electronics supply chain rather than only in chemicals.
The provisional measure: deposits, not duties
Because the case is at the preliminary stage, the measure takes the form of customs deposits (保证金) rather than duties. From 8 September 2026, importers of Japanese-origin DCS must post deposits at the company-specific rates:
| Producer | Deposit rate |
|---|---|
| Shin-Etsu Chemical Co., Ltd. (信越化学工业株式会社) | 99.2% |
| Denal Silane Co., Ltd. (德纳尔硅烷株式会社) | 80.8% |
| All other Japanese companies | 99.2% |
The deposit is levied ad valorem on the customs-determined duty-paying value of the imported goods, calculated as:
Deposit = customs value × deposit rate × (1 + import-stage VAT rate)
Deposits are not final duties. The investigation continues; the final determination may confirm, adjust or terminate the measures, and deposit treatment will follow the final outcome under the Anti-dumping Regulations.
The declaration mechanics: Announcement No. 133
On the same day, the General Administration of Customs (海关总署) issued Announcement No. 133 of 2026, aligning the declaration system with the provisional measure. From 8 September 2026, importers or their agents declaring goods under 28539090 must report DCS under the dedicated commodity code 28539090.61. The coding split is what allows the customs system to apply the deposit automatically at entry; mis-declaration risks the goods being treated outside (or inside) the measure incorrectly, with retroactive consequences once the declaration is corrected.
Procedure from here
Interested parties had 10 days from the announcement to submit written comments to the investigating authority. The next procedural milestone is the final determination, which will decide whether definitive anti-dumping duties are imposed, at what rates, and how the deposits are settled. MOFCOM’s spokesperson stressed that China applies trade-remedy measures prudently and with restraint, and that the investigation will protect the procedural rights of all interested parties.
What this means for procurement and supply-chain teams
- Verify origin and producer line by line. The measure is origin-specific (Japan) and producer-specific (named rates plus a residual rate). Mixed-supplier inventories need clear documentation of which lots are Japanese-origin and which producer supplied them; non-Japanese DCS and non-DCS goods under 28539090 remain outside the measure.
- Re-price landed cost with the deposit. At a 99.2% deposit rate on customs value plus VAT, the cash locked per shipment roughly doubles the landed-cost exposure during the provisional period. Contract clauses on who bears provisional trade-remedy charges — buyer or seller — should be checked and, where needed, renegotiated.
- Declare under 28539090.61. Confirm brokers and forwarders are using the new commodity code for DCS from 8 September 2026 onward; declaration errors are the most common friction point in the first weeks of a coding-based measure.
- Use the comment window if you are an interested party. Importers and downstream users with a stake in the case could submit comments during the 10-day window and monitor the final determination.
- Stress-test alternative supply. For fabs and gas suppliers, the case is a reminder that single-origin dependence on process materials carries regulatory exposure; qualification of alternative grades or origins takes months and should start before it is urgent.
Sources
- 中华人民共和国商务部 — 商务部公告2026年第37号 公布对原产于日本的进口二氯二氢硅反倾销调查的初步裁定（2026年9月7日，贸易救济局）: https://www.mofcom.gov.cn/zwgk/zcfb/art/2026/art_01c15948864a45d186abb146fe30a42b.html
- 中华人民共和国海关总署 — 海关总署公告2026年第133号（关于二氯二氢硅商品编号申报要求的公告，2026年9月7日）: http://dzs.customs.gov.cn/customs/2026-09/07/article_2026090722322660947.html
- 经济日报 — 商务部：初步认定原产于日本的二氯二氢硅存在倾销（2026年9月7日，新华社通稿）: http://bgimg.ce.cn/xwzx/gnsz/gdxw/202609/t20260907_3198977.shtml
Related reading
- see also: supplier due diligence fundamentals for China procurement (supplier-due-diligence-basics)
- see also: customs valuation and declaration compliance (customs-valuation-declaration)
日本产二氯二氢硅面临80.8%–99.2%保证金：商务部37号公告对芯片材料采购的影响
概述
2026年9月7日，商务部发布2026年第37号公告，公布对原产于日本的进口二氯二氢硅（DCS）反倾销调查的初步裁定。本案于2026年1月7日应国内产业申请立案。初步结论：日本进口产品存在倾销，国内二氯二氢硅产业受到实质损害，且倾销与实质损害之间存在因果关系。
临时措施于次日生效。对中国境内的半导体制造商、特种气体经销商和电子供应链采购方而言，这份公告把一桩贸易救济案件变成了即时的采购成本与供应商核验课题。
产品及其重要性
二氯二氢硅（化学分子式SiH2Cl2）在常温常压下为无色、易燃、有毒气体，交易纯度大于99%。其主要用途是芯片制造中的薄膜沉积——外延膜、碳化硅膜、氮化硅膜、氧化硅膜和多晶硅膜——覆盖逻辑、存储、模拟及其他芯片生产；同时可用于合成硅基系列前驱体和聚硅氮烷。
被调查产品归在税则号列28539090项下，该号列项下其他产品不在调查范围之内。二氯二氢硅在先进半导体工艺中的集中应用，是本案在电子供应链而非仅化工行业内引发关注的原因。
临时措施：保证金而非关税
由于案件处于初裁阶段，措施采用保证金而非关税形式。自2026年9月8日起，进口原产于日本的二氯二氢硅须按公司税率提供保证金：
| 生产商 | 保证金比率 |
|---|---|
| 信越化学工业株式会社 | 99.2% |
| 德纳尔硅烷株式会社 | 80.8% |
| 其他日本公司 | 99.2% |
保证金以海关审定的计税价格从价计征，计算公式为：
保证金金额 = 计税价格 × 保证金征收比率 ×（1 + 进口环节增值税税率）
保证金不是最终关税。调查将继续进行；终裁将决定是否征收确定性反倾销税、税率多少以及保证金如何结算，均按《反倾销条例》处理。
申报操作：133号公告
同日，海关总署发布2026年第133号公告，使申报系统与临时措施对接。自2026年9月8日起，申报28539090项下商品的进口货物收货人或其代理人，申报”二氯二氢硅”时应填报专用商品编号28539090.61。编码拆分让海关系统能够在进口环节自动适用保证金；申报错误是编码型措施实施初期最常见的摩擦点，更正申报后还可能产生追溯问题。
后续程序
利害关系方可在公告发布之日起10天内提交书面评论。下一个程序节点是终裁，将决定是否征收确定性反倾销税、税率以及保证金的处理方式。商务部新闻发言人表示，中方一贯审慎、克制使用贸易救济措施，将继续依法开展调查，充分保障各利害关系方权利。
对采购与供应链团队的启示
- 逐笔核验原产地与生产商。 措施按原产地（日本）和生产商（点名税率+其他公司税率）适用；混合供应商库存需要清晰单据区分日本原产批次与非日本原产批次，28539090项下非二氯二氢硅商品不在措施范围。
- 把保证金计入到岸成本。 按99.2%比率乘计税价格再加进口环节增值税，临时措施期间每批货物锁定的现金约为原有到岸成本敞口的一倍；应核查合同中临时贸易救济费用由买方还是卖方承担的条款，必要时重新谈判。
- 按28539090.61申报。 确认报关行与货代自2026年9月8日起对二氯二氢硅使用新商品编号。
- 利害关系方用好评论窗口。 与案件有利害关系的进口商和下游用户可在10天窗口内提交评论意见，并跟踪终裁进展。
- 对替代供应做压力测试。 对晶圆厂和气体供应商而言，本案提醒：工艺材料对单一原产地的依赖存在监管敞口；替代等级或替代原产地的验证需要数月，应提前启动。
来源
- 中华人民共和国商务部 — 商务部公告2026年第37号（2026年9月7日，贸易救济局）: https://www.mofcom.gov.cn/zwgk/zcfb/art/2026/art_01c15948864a45d186abb146fe30a42b.html
- 中华人民共和国海关总署 — 海关总署公告2026年第133号（二氯二氢硅商品编号申报要求，2026年9月7日）: http://dzs.customs.gov.cn/customs/2026-09/07/article_2026090722322660947.html
- 经济日报 — 商务部：初步认定原产于日本的二氯二氢硅存在倾销（2026年9月7日）: http://bgimg.ce.cn/xwzx/gnsz/gdxw/202609/t20260907_3198977.shtml
相关阅读
- 见：中国采购的供应商尽职调查基础（supplier-due-diligence-basics）
- 见：海关估价与申报合规（customs-valuation-declaration）