Brazil NCM · 8-digit subitem

NCM 2931.59.11 – Clodronic acid and its disodium salt

NCM 2931.59.11 (also written 29315911) is Brazil's code for clodronic acid and its disodium salt. Its first 6 digits are HS code 2931.59.

Official description of NCM 2931.59.11

PortuguêsOfficial
Ácido clodrônico e seu sal dissódico
EnglishUnofficial translation

Clodronic acid and its disodium salt

Nomenclatura Comum do Mercosul (Siscomex). Updated Oct 2026 · In force since Apr 2022 (Res Gecex 272/2021).

How to read NCM 2931.59.11

29Chapter 31Heading 59Subheading

HS code 2931.59
Same in every country

1Item 1Subitem

Added by Mercosur
Brazil, Argentina, Paraguay, Uruguay

The first 6 digits are the international HS code, so their meaning is the same in every country; Brazil publishes the text in Portuguese. Digits 7 and 8 are Brazil's own split of that HS code. The full 8-digit code is used on import declarations (DUIMP), invoices (NF-e) and tax filings.

Full classification path

  1. Chapter 29 Organic chemicals Produtos químicos orgânicos.
  2. Heading 29.31 Other organo-inorganic compounds Outros compostos organo-inorgânicos.
  3. Group 2931.5 Halogenated organo-phosphorous derivatives: Derivados organofosforados halogenados:
  4. Subheading 2931.59 Halogenated organo-phosphorous derivatives; other halogenated organo-phosphorous derivatives, n.e.c. in item no. 2931.5 Outros
  5. Item 2931.59.1 Clodronic acid and its disodium salt; ethephon; fotemustine Ácido clodrônico e seu sal dissódico; etefon; fotemustina
  6. Subitem 2931.59.11 Clodronic acid and its disodium salt Ácido clodrônico e seu sal dissódico

Other NCM codes under HS 2931.59

2931.59.12 EthephonEtefon 2931.59.13 FotemustineFotemustina 2931.59.91 O-Alkyl(≤C10) alkyl(C1-C3)phosphonofluoridatesAlquil(de C1 a C3)fosfonofluoridatos de O-alquila (de até C10, incluindo os cicloalquila) 2931.59.92 O-Isopropyl methylphosphonochloridateMetilfosfonocloridato de O-isopropila 2931.59.93 O-Pinacolyl methylphosphonochloridateMetilfosfonocloridato de O-pinacolila 2931.59.94 Alkyl(C1-C3)phosphonyl difluoridesDifluoreto de alquilfosfonila, com grupo alquila de C1 a C3 2931.59.95 Dialkylaminoalkylidene phosphonamidofluoridatesFosfonamidofluoridatos de P-alquila (de até C10, incluindo cicloalquila) N-(1-(dialquila (de até C10, incluindo cicloalquila)amino))alquilideno (H ou de até C10, incluindo cicloalquila) e sais alquilados ou protonados destes produtos 2931.59.96 Bis(diethylamino)methylene phosphonamidofluoridate(Bis(dietilamina)metileno)fosfonamidofluoridato de metila 2931.59.98 Halogenated P-(C1-C3)alkyl, no other P-C bondOutros compostos que contenham um átomo de fósforo ligado a um grupo alquila (de C1 a C3) mas sem outros átomos de carbono 2931.59.99 Other halogenated organophosphorus derivativesOutros

Questions about NCM 2931.59.11

What is NCM 2931.59.11?

NCM 2931.59.11 (29315911) is the Brazilian (Mercosur) code for clodronic acid and its disodium salt. Its official Portuguese description is “Ácido clodrônico e seu sal dissódico”.

What is the HS code for NCM 2931.59.11?

HS 2931.59 (Halogenated organo-phosphorous derivatives; other halogenated organo-phosphorous derivatives, n.e.c. in item no. 2931.5). The first 6 digits of an NCM code are its international HS code; the last 2 digits are Brazil's own split.

Is an NCM code the same as an HS code?

The first 6 digits are the same in every country. NCM adds an item digit (7th) and a subitem digit (8th). A code ending in 00 means Brazil does not split that HS code further.

Which countries use NCM 2931.59.11?

All Mercosur members use the same NCM codes: Argentina, Brazil, Paraguay and Uruguay.

Source: Siscomex Classif NCM table, updated Oct 2026 (Resolução Gecex nº 926/2026). The Portuguese text is the official one; the English is our translation.