G/TBT/N/CHL/628  
27 March  2023 
(23-2168) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  Spanish  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6.  
 
1. Notifying Member : CHILE 
If applicable, name of local government involved (Articles 3.2 and 7.2):  
2. Agency responsible:  
Dirección General de Obras Públicas  (Directorate -General of Public Works)  
Name and address (including telephone and fax numbers, email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indic ated if different from above:  
Subsecretaría de Relaciones Económicas Internacionales - Ministerio de Relaciones 
Exteriores de Chile (Under -Secretariat for International Economic Relations, Ministry of 
Foreign Affairs of Chile)  
3. Notified under Article 2.9.2 [X], 2.10.1 [ ], 5.6.2 [ ], 5.7.1 [ ], 3.2 [ ], 7.2 [ ], 
other:  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading . ICS numbers may be provided in addition, where applicable) : Cements 
- Chemica l analysis  
5. Title, number of pages and language(s) of the notified document : NCh 147:2020 
Cementos - Análisis químico  (NCh 147:2020 Cements - Chemical Analysis) ; (42 pages, in 
Spanish)  
6. Description of content : The notified rule establishes the procedu res for determining the 
chemical components of cements, as indicated and defined in clause 3 of the rule . This 
rule applies to the cements defined in NCh148 and used in plasters, mortars and 
concretes . This rule contains descriptions of the reference metho ds and, in some cases, 
an alternative method (see Annex A) that can be considered equivalent to the reference 
methods when it has been approved in advance, in view of the provisions of NCh -ISO/IEC 
17025. I n the event of a dispute, only the reference methods may be used . In Annex A, 
there are general guidelines on the alternative method, which uses X -ray fluorescence 
(XRF) for the determination of silicon oxide (SiO2), aluminium oxide (Al2O3), iron oxide 
(Fe2O3), calcium oxide (CaO), magnesiu m oxide (MgO), sulphur trioxide (SO3), 
potassium oxide (K2O), sodium oxide (Na2O), titanium dioxide (TiO2), phosphorus oxide 
(P2O5), manganese oxide (Mn2O3), strontium oxide (SrO), chloride (Cl) and bromine 
(Br). The alternative method can be applied to ot her relevant cases when appropriate 
calibration has been carried out . This method is based on the use of fused beads or 
pressed pellets and on analytical validation through the use of reference materials.  
The rule does not concern safety or environmental i ssues associated with its use, if there 
are any . It is the responsibility of the user of this rule to establish appropriate health and 
safety practices, and to determine the degree of application of the regulatory limitations 
prior to use.  G/TBT/N/CHL/628  
- 2 - 
  7. Objective an d rationale, including the nature of urgent problems where 
applicable : Quality requirements  
8. Relevant documents:  
• NCh 148 Cemento - Terminología, clasificación y especificaciones generales  
• NCh 162 Cemento - Extracción de muestras  
• NCh 426/2 Agua grado reactivo para el análisis - Especificaciones - Parte 2 : Análisis 
fisico-quimicos y microbiológicos de agua potable, aguas crudas y aguas 
residuales.  
• ASTM C1365 Standard Test Method for Determination of the Proportion of Phases 
in Portland Cement and Portland -Cement Clinker Using X -Ray Powder Diffraction 
Analysis.  
• NCh-ISO/IEC 17025  Requisitos generales para la competencia de los laboratorios 
de ensayo y calibración.  
• Manual de Carreteras del MOP , available at: https://mc.mop.gob.cl/  
9. Proposed date of adoption : - 
Proposed date of entry into force : - 
10. Final date for comments : 60 days from notification  
11. Texts available from : National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available, of other body:  
Subsecretaría de Relaciones Económicas Internacionales  
Ministerio de Relaciones Exteriores de Chile  
Teatinos 180, piso 11  
Tel.: (+56)-2-22827 5250  
Email: tbt_chile@subrei.gob.cl  
To view the above -mentioned standards, go to https://www.inncoleccion.cl/  and enter 
the following detai ls: 
Empresa  (Company) : SUBREI -001-23 
Usuario  (Username) : subrei 
Contraseña  (Password) : subrei