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GB/T 26370-2020 PDF in English


GB/T 26370-2020 (GB/T26370-2020, GBT 26370-2020, GBT26370-2020)
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GB/T 26370-2020: PDF in English (GBT 26370-2020)

GB/T 26370-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 11.080
C 50
Replacing GB/T 26370-2010
Hygienic Requirements for Disinfectant Containing
Bromine
ISSUED ON: JUNE 02, 2020
IMPLEMENTED ON: DECEMBER 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 Requirements for Raw Materials ... 7
5 Technical Requirements ... 7
6 Application Range ... 9
7 Use Methods ... 9
8 Inspection Methods ... 9
9 Packaging, Transportation and Storage ... 10
10 Marking, Label and Instruction Manual ... 11
Appendix A (Normative) Determination of Bromochloro-5,5-Dimethylhydantoin
Content and Available Halogen (by Cl) Content ... 12
Appendix B (Normative) Determination of 1,3-Dibromo-5,5-Dimethylhydantoin
Content and Available Bromine (by Br) Content ... 15
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 26370-2010 Hygienic Standard for Disinfectants with
Bromine. Compared with GB/T 26370-2010, this Standard has the major technical
changes as follows:
--- Delete "Precautions" and "This Standard is not applicable the disinfectants
combined the bromochloro-5,5-dimethylhydantoin or 1,3-dibromo-5,5-
dimethylhydantoin with effective ingredients of other disinfectants" from the
scope of the standard (see Clause1 of 2010 Edition);
--- Add the normative references (see Clause 2 of this Edition);
--- Modify the terms and definitions of bromine-containing disinfectants (see 3.1 of
this Edition; 3.1 of 2010 Edition);
--- Delete the terms and definitions of general object surfaces (see 3.4 of 2010
Edition);
--- Modify the raw material requirements (see Clause 4 of this Edition; Clause 4 of
2010 Edition);
--- Delete the sensory attribute requirements (see 5.1 of 2010 Edition);
--- Increase the mass fraction requirements of bromine and chlorine (see Table 1 of
this Edition);
--- Modify the requirements for the mass fraction of bromochloro-5,5-
dimethylhydantoin, available halogen (by Cl) and loss on drying (see Table 1 of
this Edition; Table 1 of 2010 Edition);
--- Delete the available halogen reduction rate index requirements within the validity
period (see Table 1 of 2010 Edition);
--- Modify the requirements for the mass fraction of 1,3-dibromo-5,5-
dimethylhydantoin, available bromine (by Br) and loss on drying (see Table 2 of
this Edition; Table 2 of 2010 Edition);
--- Delete the available bromine reduction rate index requirements within the validity
period (see Table 2 of 2010 Edition);
--- Increase the weight difference of the disinfectant product tablets produced by
using bromochloro-5,5-dimethylhydantoin disinfectant or 1,3-dibromo-5,5-
dimethylhydantoin disinfectant and other non-disinfecting factors (accessories);
Hygienic Requirements for Disinfectant Containing
Bromine
1 Scope
This Standard specifies the raw material requirements, technical requirements,
application scope, use methods, inspection methods, packaging, transportation and
storage, marking, labeling and instruction manual of bromine-containing disinfectants.
This Standard is applicable to disinfectants that use bromochloro-5,5-
dimethylhydantoin or 1,3-dibromo-5,5-dimethylhydantoin as the bactericidal
component.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) is applicable to this document.
GB/T 191 Packaging – Pictorial Marking for Handling of Goods
GB/T 601 Chemical Reagent - Preparations of Standard Volumetric Solutions
GB/T 603 Chemical Reagent--Preparations of Reagent Solutions for Use in Test
Methods
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 21845 Chemicals - Water Solubility Test
GB/T 23849 1,3-Dibromo-5,5-dimethylhydantoin
GB/T 23854 Bromochloro-5,5-dimethylhydantoin
Pharmacopoeia of the People’s Republic of China (2015 Edition, Four Volumes)
Technical Standard for Disinfection (2002 Edition) [Ministry of Health (WFJF (2002)
No.282]
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
3.1 disinfectant containing bromine
The disinfectant, after dissolving in water, can be hydrolyzed to generate hypobromous
acid and has a sterilizing effect.
3.2 Available bromine
The amount of bromine equivalent to the oxidizing ability of bromine-containing
disinfectant, and measuring the oxidizing ability of bromine-containing disinfectant.
NOTE: Its content is expressed by mass concentration (mg/L) or mass fraction (%).
3.3 Available halogen
The total amount of halogen equivalent to the oxidizing ability of halogen-containing
disinfectants, and measuring the oxidizing ability of halogen-containing disinfectant.
NOTE: Its content is expressed by mass concentration (mg/L) or mass fraction (%).
4 Requirements for Raw Materials
4.1 Bromochloro-5,5-dimethylhydantoin shall meet the technical index requirements
for qualified products specified in GB/T 23854. If accessories are added, the
accessories shall comply with relevant standards and regulations.
4.2 1,3-Dibromo-5,5-dimethylhydantoin shall meet the technical index requirements for
qualified products specified in GB/T23849. If accessories are added, the accessories
shall comply with relevant standards and regulations.
5 Technical Requirements
5.1 Physical and chemical index
5.1.1 Bromochloro-5,5-dimethylhydantoin disinfectant
The mass requirements shall comply with the provisions of Table 1.
bromine content
It shall be carried out as per Appendix B.
8.2 Determination of solubility
It shall be carried out as per GB/T 21845.
8.3 Determination of loss on drying
8.3.1 1,3-Dibromo-5,5-dimethylhydantoin disinfectant shall be carried out as per the
method specified in GB/T 23849.
8.3.2 Bromochloro-5,5-dimethylhydantoin disinfectant shall be carried out as per the
method specified in GB/T 23854.
8.4 Determination of weight difference for tablets
It shall be carried out as per the method stipulated in The Pharmacopoeia of the
People's Republic of China (2015 Edition, Four Volumes).
8.5 Determination of the disintegration time limit of effervescent tablets
It shall be carried out as per the method stipulated in The Pharmacopoeia of the
People's Republic of China (2015 Edition, Four Volumes).
8.6 Determination of disinfection effect
It shall be carried out as per Technical Standard for Disinfection (2002 Edition).
9 Packaging, Transportation and Storage
9.1 Packaging
It shall meet the requirements of GB/T 23849 or GB/T 23854.
9.2 Transportation
During transportation, it shall not be mixed with other goods; and is forbidden to
transport together with acids or alkalis, easily oxidized organic matter, and reducing
substances. Covers shall be provided to prevent sunlight, rain, and moisture; and the
packaging shall be kept intact and clearly marked.
9.3 Storage
It shall be stored in a cool, dry place; protected from the sun, rain, and moisture. It is
forbidden to store together with acids or alkalis and easily oxidized organics and
Appendix A
(Normative)
Determination of Bromochloro-5,5-Dimethylhydantoin
Content and Available Halogen (by Cl) Content
A.1 Principle
In acid solutions, bromine-containing disinfectants may oxidize potassium iodide to
iodine. Use starch solution as indicator to titrate the generated iodine by sodium
thiosulfate solution; and calculate the content of available halogen (by Cl) based on
the consumed amount of sodium thiosulfate solution.
A.2 Reagents or materials
Safety Tips: Sulfuric acid is a strong acid and is corrosive, so pay attention to it
when using. When splashing on the body, rinse with plenty of water, avoid
inhalation or contact with skin.
Unless otherwise specified, the reagents used in this method are all analytically pure;
and the test water is the Class-I water specified in GB/T 6682.
A.2.1 Potassium iodide solution: 300g/L potassium iodide (analytically-pure) solution.
A.2.2 Sulfuric acid solution: it is prepared by adding 1 portion of 95%~98% analytically-
pure sulfuric acid to 5 portions of deionized water.
A.2.3 Starch indicator: 10g/L starch solution, prepared according to GB/T 603.
A.2.4 Sodium thiosulfate solution: 0.1mol/L sodium thiosulfate titrant, prepared and
calibrated according to GB/T 601.
A.3 Apparatus
A.3.1 Electronic analytical balance: accuracy of 0.1mg.
A.3.2 Magnetic stirrer.
A.4 Test procedures
A.4.1 Powders and granules may be weighed directly; and tablets are weighed after
grinding with a dry mortar.
A.4.2 Weigh 0.15g of sample (accurate to 0.0001g); add it to a dry and clean 250mL
Appendix B
(Normative)
Determination of 1,3-Dibromo-5,5-Dimethylhydantoin
Content and Available Bromine (by Br) Content
B.1 Principle
In acid solutions, bromine-containing disinfectants may oxidize potassium iodide to
iodine. Use starch solution as indicator to titrate the generated iodine by sodium
thiosulfate solution; and calculate the available bromine content and 1,3-dibromo-5,5-
dimethylhydantoin content according to the consumed amount of sodium thiosulfate
solution.
B.2 Reagents or materials
Safety Tips: Sulfuric acid is a strong acid and is corrosive, so pay attention to it
when using. When splashing on the body, rinse with plenty of water, avoid
inhalation or contact with skin.
Unless otherwise specified, the reagents used in this method are analytically-pure, and
the test water is the Class-I water specified in GB/T 6682.
B.2.1 Potassium iodide: analytically-pure.
B.2.2 Sulfuric acid solution: it is prepared by adding 1 portion of 95% ~ 98%
analytically-pure sulfuric acid to 8 portions of deionized water.
B.2.3 Starch indicator: 5g/L starch solution, prepared according to GB/T 603.
B.2.4 Sodium thiosulfate solution: 0.1mol/L sodium thiosulfate titrant, prepared and
calibrated according to GB/T 601.
B.3 Apparatus
B.3.1 Electronic analytical balance: accuracy of 0.1mg.
B.3.2 Magnetic stirrer.
B.4 Test procedures
B.4.1 Powders and granules may be weighed directly; and tablets shall be weighed
after grinding with a dry mortar.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.