Silicates; commercial alkali metal silicates › Of sodium
2839.11.00 — Sodium metasilicates
Natri metasilicat
Unit: kg (kg)
HS code 28391100 covers sodium metasilicates under heading 2839 (silicates; commercial alkali metal silicates), Chapter 28. The MFN import duty is 3%; the lowest FTA rate is 0% under ASEAN - China (ACFTA) (C/O form E required). VAT: 8/10%. Unit of quantity: kg.
MFN import duty
3%
Lowest FTA
0%
excl. MY
ASEAN - China (ACFTA)
VAT
8/10%
Excise / Env. tax
—
Not subject
Import duty comparison across FTA schedules
Full table with legal documents & effective dates
| Tax / Schedule | Rate | Document | Effective |
|---|---|---|---|
| Preferential import duty (MFN) | 3% | 26/2023/NĐ-CP | 15/07/2023 |
| Ordinary import duty | 4.5% | 15/2023/QĐ-TTg | 15/07/2023 |
| ASEAN (ATIGA)(2026) | 0% | 126/2022/NĐ-CP | 30/12/2022 |
| ASEAN - China (ACFTA) | 0%excl. MY | 118/2022/NĐ-CP | 30/12/2022 |
| ASEAN - Japan (AJCEP)(01/04/2026 - 31/3/2027) | 0% | 120/2022/NĐ-CP | 30/12/2022 |
| Vietnam - Japan (VJEPA)(1/4/2026 - 31/3/2027) | 0% | 124/2022/NĐ-CP | 30/12/2022 |
| ASEAN - Korea (AKFTA) | 0%excl. MM | 119/2022/NĐ-CP | 30/12/2022 |
| ASEAN - Australia/New Zealand (AANZFTA) | 0% | 121/2022/NĐ-CP | 30/12/2022 |
| ASEAN - India (AIFTA)(01/01/2026 - 31/12/2026) | 0% | 122/2022/NĐ-CP | 30/12/2022 |
| Vietnam - Korea (VKFTA)(2026) | 0% | 125/2022/NĐ-CP | 30/12/2022 |
| Vietnam - Chile (VCFTA)(2026) | 0% | 112/2022/NĐ-CP | 30/12/2022 |
| Vietnam - Eurasian Economic Union (VN-EAEU)(2026) | 0% | 113/2022/NĐ-CP | 30/12/2022 |
| CPTPP Agreement(2026) | 0% | 115/2022/NĐ-CP | 30/12/2022 |
| ASEAN - Hong Kong (AHKFTA)(2026) | 0% | 123/2022/NĐ-CP | 30/12/2022 |
| Vietnam - EU (EVFTA)(2026) | 0% | 116/2022/NĐ-CP | 30/12/2022 |
| Vietnam - UK (UKVFTA)(2026) | 0% | 117/2022/NĐ-CP | 30/12/2022 |
| Vietnam - Laos | 0% | 206/2025/NĐ-CP | 15/07/2025 |
| Vietnam - Israel (VIFTA)(2026) | 2,1% | 131/2024/NĐ-CP | 15/10/2024 |
| RCEP - Group A (ASEAN)(2026) | 0% | 129/2022/NĐ-CP | 30/12/2022 |
| RCEP - Group B (China)(2026) | 0% | 129/2022/NĐ-CP | 30/12/2022 |
| RCEP - Group C (Korea)(2026) | 0% | 129/2022/NĐ-CP | 30/12/2022 |
| RCEP - Group D (Japan)(2026) | 0% | 129/2022/NĐ-CP | 30/12/2022 |
| RCEP - Group E (Australia)(2026) | 0% | 129/2022/NĐ-CP | 30/12/2022 |
| RCEP - Group F (New Zealand)(2026) | 0% | 129/2022/NĐ-CP | 30/12/2022 |
FTA schedules are cut annually: the rate shown applies to the period in brackets, per the decree's appendix.
VAT · Excise tax · Environmental protection tax
| Tax / Schedule | Rate | Document | Effective |
|---|---|---|---|
| Value added tax (VAT) | 8/10% | 181/2025/NĐ-CP | 01/07/2025 |
Rules of origin by FTA
To claim an FTA rate the goods must meet the origin criterion below AND carry a valid C/O — the right HS code alone is not enough.
- - Sodium metasilicates
RVC(40) hoặc CTSH
CTSHRVC40
Source: 44/2025/TT-BCT · annex uses HS 2022 while this site uses AHTN 2022 — check headings that changed between versions
Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
Sử dụng nguyên liệu từ bất kỳ Nhóm nào để sản xuất, ngoại trừ Nhóm của sản phẩm. Tuy nhiên, được phép sử dụng nguyên liệu cùng Nhóm với sản phẩm với điều kiện tổng trị giá sử dụng không vượt quá 20% giá xuất xưởng của sản phẩm; hoặc Trị giá nguyên liệu được sử dụng không vượt quá 50% giá xuất xưởng của sản phẩm.
Source: 14/2026/TT-BCT
- - Sodium metasilicates
CTH hoặc RVC40
CTHRVC40
Source: 32/2022/TT-BCT · annex uses HS 2022 while this site uses AHTN 2022 — check headings that changed between versions
Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
Sản xuất từ nguyên liệu thuộc bất kỳ Nhóm nào, ngoại trừ Nhóm của sản phẩm. Tuy nhiên, có thể sử dụng nguyên liệu cùng Nhóm với sản phẩm với điều kiện tổng trị giá các nguyên liệu này không vượt quá 20% giá xuất xưởng của sản phẩm; hoặc Trị giá nguyên liệu không vượt quá 50% giá xuất xưởng của sản phẩm.
Source: 02/2021/TT-BCT
Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
CTH
CTH
or
50%
Source: 11/2024/TT-BCT
- - Sodium metasilicates
CTH hoặc RVC(40)
CTHRVC40
Source: 09/2022/TT-BCT · annex uses HS 2017 while this site uses AHTN 2022 — check headings that changed between versions
- - Sodium metasilicates
CTH
CTH
Source: 01/2024/TT-BCT · annex uses HS 2022 while this site uses AHTN 2022 — check headings that changed between versions
Agreements with no rule specific to this code
This code carries a preferential rate under the agreements below but has no line of its own in the product-specific rules annex. The goods must still meet an origin requirement.
The agreement sets a general rule for codes outside the annex:
1. The goods referred to in Clause 3, Article 5 of this Circular, other than the goods provided in Clause 2 of this Article, are considered originating if:
a) The goods have a regional value content (RVC) of not less than 40% of the FOB value calculated in accordance with Article 8 of this Circular and the last production process is carried out in a Member State; or
b) Goods of Chapters 25, 26, 28, 29, 31 and 39; Chapters 42 to 49; Chapters 57 to 59; Chapters 61, 62 and 64; Chapters 66 to 71; Chapters 73 to 83; Chapters 86 and 88; and Chapters 91 to 97 of the Harmonized Commodity Description and Coding System using non-originating materials undergo a change in tariff classification at the 4-digit level (CTH), except for headings 29.01, 29.02, 31.05, 39.01, 39.02, 39.03, 39.07 and 39.08, to which the RVC 40% origin criterion applies.
CTHRVC40
Source: 12/2019/TT-BCT · Article 7(1)
The agreement sets a general rule for codes outside the annex:
1. The goods referred to in Clause 3, Article 5 of this Circular, other than the goods provided in Clause 2 of this Article, are considered originating if they have an RVC of not less than 40% calculated in accordance with Article 8 of this Circular.
Source: 21/2019/TT-BCT · Article 7(1)
The agreement sets a general rule for codes outside the annex:
1. Products referred to in Clause 2, Article 2 are considered originating if:
a) The AIFTA content is not less than thirty-five per cent (35%) of the FOB value; and
b) The non-originating materials used in the production of that product have undergone a change in tariff classification at the six (6)-digit level (CTSH) of the Harmonized System.
provided that the last production process is carried out in the territory of the exporting Member State.
CTSH
Source: 15/2010/TT-BCT · Article 4(1) of Appendix 1
The agreement sets a general rule for codes outside the annex:
1. For the purposes of paragraph 2 of Article 5 of this Circular, goods shall be considered as originating in a Member State in one of the following cases:
a) The Regional Value Content (RVC) is not less than 40%, calculated according to the formula provided for in Article 8 of this Circular, and the final process of production is performed in that Member State.
b) All non-originating materials used in the production of the goods have undergone a change in tariff classification (CTC) at the four (04)-digit level (change of Heading) of the Harmonized Commodity Description and Coding System in that Member State.
The exporter of each Member State may choose to apply the origin criterion provided for in point a or point b of paragraph 1 of this Article to determine the origin of goods.
CTC
Source: 37/2022/TT-BCT · Article 7(1)
The agreement sets a general rule for codes outside the annex:
1. For the purposes of point b clause 1 Article 5 of this Circular, goods not covered by Article 8 of this Circular shall be considered as originating if they have a regional value content (hereinafter referred to as RVC) of at least 40% of the FOB value, or if they have undergone a change in tariff classification at the 4-digit level (hereinafter referred to as CTH) of the Harmonized System.
CTH
Source: 49/2025/TT-BCT · Article 7(1)
The agreement sets a general rule for codes outside the annex:
1. General origin criteria:
a) Goods referred to in Clause 2, Article 2 of this Appendix are considered originating in the Member State where the production or processing of those goods took place if:
- The goods have a regional value content (hereinafter referred to as the “ASEAN Value Content” or the “Regional Value Content (RVC)”) of not less than 40% (forty per cent), calculated in accordance with the formula provided in Article 5 of this Appendix; or
- All non-originating materials used in the production of those goods have undergone a change in tariff classification (hereinafter referred to as “CTC”) at the 4 (four)-digit level (that is, a change of heading) of the Harmonized System.
b) Each Member State shall allow the exporter of the goods to decide whether to use the criterion of “RVC of not less than 40% (forty per cent)” or that of “a change in tariff classification at the 4 (four)-digit level” referred to at Point a, Clause 1 in determining the origin of the goods.
CTC
Source: 22/2016/TT-BCT · Article 4(1) of Appendix I
The agreement sets NO general rule. Apart from wholly obtained goods and goods produced entirely from originating materials, the only route is to meet the annex — and no annex line matches this code, so check the circular itself:
a) Is wholly obtained or produced entirely in the territory of one or more Member countries as provided in Article 6 of this Circular;
b) Is produced entirely in the territory of one or more Member countries exclusively from originating materials;
c) Is produced entirely in the territory of one or more Member countries using non-originating materials, provided that the good satisfies all applicable requirements set out in Appendix I issued together with this Circular.
Source: 03/2019/TT-BCT · Article 5(1)
The agreement sets a general rule for codes outside the annex:
1. For the purposes of Clause 2, Article 2, goods are considered originating in the Member State where the production or processing took place if:
a) The goods have a regional value content (RVC) of not less than forty per cent (40%), calculated in accordance with Article 5; or
b) All the non-originating materials used in the production of those goods undergo a change in tariff classification (hereinafter referred to as “CTC”) at the four (4)-digit level (that is, a change of heading) of the Harmonized System.
2. Each Member State shall allow the exporter to use either of the criteria provided at Point a, Clause 1 or Point b, Clause 1 of this Article to determine the origin of the goods.
CTC
Source: 31/2013/TT-BCT · Article 4(1)
The agreement sets a general rule for codes outside the annex:
1. For the purposes of Clause 2, Article 2, goods are considered originating in a Member State if:
a) The goods have a local value content (hereinafter referred to as “LVC”), calculated in accordance with the formula provided in Article 5, of not less than forty (40) per cent, and the last production process for those goods is carried out in that Member State; or
b) All non-originating materials used in the production of the goods in that Member State have undergone a change in tariff classification (hereinafter referred to as CTC) at the 4-digit level (change of heading) under the Harmonized System.
CTCLVC
Source: 10/2009/TT-BCT · Article 4(1) of Appendix 1
The agreement sets a general rule for codes outside the annex:
1. General origin criterion
a) Goods specified in Clause 2 of Article 2 shall be considered as originating in the Member State where the working or processing of those goods has taken place if:
- The goods have a regional value content (hereinafter referred to as the “Viet Nam - Laos value content” or the “regional value content (LVC)”) of not less than forty percent (40%), calculated in accordance with the formula provided in Article 5; or
- All non-originating materials used in the production of those goods have undergone a change in tariff classification (hereinafter referred to as “CTC”) at the four (4)-digit level (meaning a change of heading) of the Harmonized System.
b) Each Member State shall allow the exporter of the goods to decide to use either of the two criteria “LVC of not less than forty percent (40%)” or “change in tariff classification at the four (04)-digit level” referred to at point a of Clause 1 in order to determine the origin of the goods.
CTCLVC
Source: 04/2010/TT-BCT · Article 4(1) of Appendix 1
Criteria are quoted verbatim from the Vietnamese circular, not paraphrased.
Commodity policy for this HS code
Unofficial English rendering of the Vietnamese source; the document numbers link to the full text.
- Chemicals subject to conditional production and trading in the industrial sector (113/2017/NĐ-CP PL1)
- Chemicals subject to mandatory declaration (113/2017/NĐ-CP PL5)
Expired legal documents
- 113/2017/NĐ-CPexpired since 17/01/2026→ replaced by 24/2026/NĐ-CP, 25/2026/NĐ-CP, 26/2026/NĐ-CP
Effectivity checked as of 21/07/2026
Notes for Section VI — PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES
Notes
1. (A) Goods (other than radioactive ores) answering to a description in heading 28.44 or 28.45 are to be classified in those headings and in no other heading of the Nomenclature.
(B) Subject to paragraph (A) above, goods answering to a description in heading 28.43, 28.46 or 28.52 are to be classified in those headings and in no other heading of this Section.
2. Subject to Note 1 above, goods classifiable in heading 30.04, 30.05, 30.06, 32.12, 33.03, 33.04, 33.05, 33.06, 33.07, 35.06, 37.07 or 38.08 by reason of being put up in measured doses or for retail sale are to be classified in those headings and in no other heading of the Nomenclature.
3. Goods put up in sets consisting of two or more separate constituents, some or all of which fall in this Section and are intended to be mixed together to obtain a product of Section VI or VII, are to be classified in the heading appropriate to that product, provided that the constituents are:
(a) having regard to the manner in which they are put up, clearly identifiable as being intended to be used together without first being repacked;
(b) presented together; and
(c) identifiable, whether by their nature or by the relative proportions in which they are present, as being complementary one to another.
4. Where a product answers to a description in one or more of the headings in Section VI by virtue of being described by name or function and also to heading 38.27, then it is classifiable in a heading that references the product by name or function and not under heading 38.27.
Notes for Chapter 28 — Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
Notes
1. Except where the context otherwise requires, the headings of this Chapter apply only to:
(a) Separate chemical elements and separate chemically defined compounds, whether or not containing impurities;
(b) The products mentioned in (a) above dissolved in water;
(c) The products mentioned in (a) above dissolved in other solvents provided that the solution constitutes a normal and necessary method of putting up these products adopted solely for reasons of safety or for transport and that the solvent does not render the product particularly suitable for specific use rather than for general use;
(d) The products mentioned in (a), (b) or (c) above with an added stabiliser (including an anti-caking agent) necessary for their preservation or transport;
(e) The products mentioned in (a), (b), (c) or (d) above with an added anti-dusting agent or a colouring substance added to facilitate their identification or for safety reasons, provided that the additions do not render the product particularly suitable for specific use rather than for general use.
2. In addition to dithionites and sulphoxylates, stabilised with organic substances (heading 28.31), carbonates and peroxocarbonates of inorganic bases (heading 28.36), cyanides, cyanide oxides and complex cyanides of inorganic bases (heading 28.37), fulminates, cyanates and thiocyanates, of inorganic bases (heading 28.42), organic products included in headings 28.43 to 28.46 and 28.52 and carbides (heading 28.49), only the following compounds of carbon are to be classified in this Chapter:
(a) Oxides of carbon, hydrogen cyanide and fulminic, isocyanic, thiocyanic and other simple or complex cyanogen acids (heading 28.11);
(b) Halide oxides of carbon (heading 28.12);
(c) Carbon disulphide (heading 28.13);
(d) Thiocarbonates, selenocarbonates, tellurocarbonates, selenocyanates, tellurocyanates, tetrathiocyanatodiamminochromates (reineckates) and other complex cyanates, of inorganic bases (heading 28.42);
(e) Hydrogen peroxide, solidified with urea (heading 28.47), carbon oxysulphide, thiocarbonyl halides, cyanogen, cyanogen halides and cyanamide and its metal derivatives (heading 28.53) other than calcium cyanamide, whether or not pure (Chapter 31).
3. Subject to the provisions of Note 1 to Section VI, this Chapter does not cover:
(a) Sodium chloride or magnesium oxide, whether or not pure, or other products of Section V;
(b) Organo-inorganic compounds other than those mentioned in Note 2 above;
(c) Products mentioned in Note 2, 3, 4 or 5 to Chapter 31;
(d) Inorganic products of a kind used as luminophores, of heading 32.06; glass frit and other glass in the form of powder, granules or flakes, of heading 32.07;
(e) Artificial graphite (heading 38.01); products put up as charges for fire-extinguishers or put up in fire-extinguishing grenades, of heading 38.13; ink removers put up in packings for retail sale, of heading 38.24; cultured crystals (other than optical elements) weighing not less than 2.5 g each, of the halides of the alkali or alkaline-earth metals, of heading 38.24;
(f) Precious or semi-precious stones (natural, synthetic or reconstructed) or dust or powder of such stones (headings 71.02 to 71.05), or precious metals or precious metal alloys of Chapter 71;
(g) The metals, whether or not pure, metal alloys or cermets, including sintered metal carbides (metal carbides sintered with a metal), of Section XV; or
(h) Optical elements, for example, of the halides of the alkali or alkaline-earth metals (heading 90.01).
4. Chemically defined complex acids consisting of a non-metal acid of sub-Chapter II and a metal acid of sub-Chapter IV are to be classified in heading 28.11.
5. Headings 28.26 to 28.42 apply only to metal or ammonium salts or peroxysalts.
Except where the context otherwise requires, double or complex salts are to be classified in heading 28.42.
6. Heading 28.44 applies only to:
(a) Technetium (atomic No. 43), promethium (atomic No. 61), polonium (atomic No. 84) and all elements with an atomic number greater than 84;
(b) Natural or artificial radioactive isotopes (including those of the precious metals or of the base metals of Sections XIV and XV), whether or not mixed together;
(c) Compounds, inorganic or organic, of these elements or isotopes, whether or not chemically defined, whether or not mixed together;
(d) Alloys, dispersions (including cermets), ceramic products and mixtures containing these elements or isotopes or inorganic or organic compounds thereof and having a specific radioactivity exceeding 74 Bq/g (0.002 μCi/g);
(e) Spent (irradiated) fuel elements (cartridges) of nuclear reactors;
(f) Radioactive residues whether or not usable.
The term “isotopes”, for the purposes of this Note and of the wording of headings 28.44 and 28.45, refers to:
7. Heading 28.53 includes copper phosphide (phosphor copper) containing more than 15% by weight of phosphorus.
8. Chemical elements (for example, silicon and selenium) doped for use in electronics are to be classified in this Chapter, provided that they are in forms unworked as drawn, or in the form of cylinders or rods. When cut in the form of discs, wafers or similar forms, they fall in heading 38.18.
Subheading Note
1. For the purposes of subheading 2852.10, the expression “chemically defined” means all organic or inorganic compounds of mercury meeting the requirements of paragraphs (a) to (e) of Note 1 to Chapter 28 or paragraphs (a) to (h) of Note 1 to Chapter 29.
Codes at the same level under “Of sodium:”
Check neighbouring codes to make sure the classification fits best.
Data updated: 29/07/2026 · Found wrong or missing data? Report an issue for this code →