G/TBT/N/RWA/433  
8 March 2021  
(21-1900) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  
NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  RWANDA   
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:  Rwanda Standards Board (RSB)  
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 indicated if different from above:   
Rwanda Stan dards Board  
KK 15 Rd, 49  
P.O.BOX 7099, Kigali, Rwanda  
Tel: +250 788303492  
Email: info@rsb.gov.rw   
Website: www.rsb.gov.rw  
3. Notified under Article 2.9.2 [X], 2.10.1 [   ], 5.6.2 [   ], 5.7.1 [   ], other :  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  Chemicals 
for purification of water (ICS 71.100.80)  
5. Title, number of pages and language(s) of the notified document:  DRS 277: 2021 
Water quality — Chemicals used for treatment of water intended for human consumption 
Part 6: Hydrated lime (15 page(s), in English)  
6. Description of content:  This Committee Draft Standard lays down requirements and 
methods of test for hydrated lime used for treatment of water intended for human 
consumption  
7. Objective and rationale, including the nature of urgent proble ms where 
applicable:  Consumer information, labelling; Prevention of deceptive practices and 
consumer protection; Protection of human health or safety; Protection of the 
environment; Quality requirements; Reducing trade barriers and facilitating trade  
8. Relevant documents:   
• ISO 17378 -2 water quality — determination of arsenic and antimony — part 2: 
method using hydride generation atomic absorption spectrometry (hg -aas) 
• ISO 21587 -1, Chemical analysis of aluminosilicate refractory products 
(alternative to t he X-ray fluorescence method) — Part 1: Apparatus, reagents, 
dissolution and gravimetric silica  
• ISO 21587 -2, Chemical analysis of aluminosilicate refractory products 
(alternative to the X -ray fluorescence method) — Part 2: Wet chemical analysis  G/TBT/N/RWA/433  
 
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  • ASTM C25 – 19 Standard Test Methods for Chemical Analysis of Limestone, 
Quicklime, and Hydrated Lime  
• ASTM E449 – 18 Standard Test Methods for Analysis of Calcium Chloride  
• ISO 3165, Sampling of chemical products for industrial use — Safety in 
sampling  
• ISO 8213, Chemic al products for industrial use — Sampling techniques — solid 
chemical products in the form of particles varying from powders to coarse lumps  
9. Proposed date of adoption:  To be determined  
Proposed date of entry into force:  To be determined  
10. Final date for comments:  60 days from notification  
11. Texts available from:  National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available , of other body:   
KK 15 Rd, 49  
Toll Free: 3250  
Tel: +250 788303492  
Email: info@rsb.gov.rw  
Website: www.rsb.gov.rw  
P.O.BOX 7099, Kigali, Rwanda  
https:// members.wto.org/crnattachments/2021/TBT/RWA/21_1690_00_e.pdf