COVID-19: Disinfecting Your Homes and Offices

The Article Earlier Published in https://www.spotlightnepal.com/2020/06/26/covid-19-disinfecting-your-homes-and-offices/

To fight Covid-19 in your homes and offices you must clean and disinfect the areas where you live and work. To prevent and control the spread of the disease, particular attention should be paid to environmental cleaning of high-touch surfaces, such as tables, chairs, kitchen and food preparation areas, refrigerator handles, doorknobs, window handles, light switches, phones, tablets, touch screens, remote controls, keyboards, cabinet handles, desks, toilets, taps, bathroom surfaces, sinks, work surfaces, etc. It is equally important to routinely monitor the cleaning practices and cleanliness, including choice of disinfectant, measuring and mixing of chemicals, their safe handling & storage and proper use of Personal Protective Equipment (PPE).

As long as general environmental disinfection is concerned hypochlorite-based products are highly useful and recommended. They include liquid (sodium hypochlorite), solid or powdered (calcium hypochlorite) formulations. World Health Organization (WHO) determines hypochlorite to be effective against rotavirus at a concentration of 0.05% (500 ppm), however, higher concentrations of 0.5% (5000 ppm) are required for some highly resistant pathogens or viruses.

1. Prepare Chlorine Solution from Sodium Hypochlorite Solution

Commercial sodium hypochlorite solutions with different levels of concentration may be readily available for use in a variety of settings (usually with 5% Chlorine Concentration). In non-health care settings, sodium hypochlorite (bleach) may be used at a recommended concentration of 0.1% (1000ppm). However, the recommendation of 0.1% (1000 ppm) in the context of COVID-19 is a conservative concentration; therefore a concentration of 0.5% (5000 ppm) is recommended.

To achieve the desired concentration (in this case 0.5% Chlorine), it is necessary to prepare sodium hypochlorite by diluting the basic aqueous solution with a given proportion of clean, non-turbid water to produce the final desired concentration. Please see below for the calculation of sodium hypochlorite concentrations:

1.1 Formula,

[% Chlorine in liquid sodium hypochlorite / % Chlorine desired] − 1 = Total parts of water for each part sodium hypochlorite.

1.2 Example,

[5% in liquid sodium hypochlorite / 0.5% Chlorine desired] -1 = 9 parts of water for each part sodium hypochlorite

Therefore, you must mix 9 parts of water for each part of sodium hypochlorite solution (5%) to make 0.5% Chlorine solution to be used as a proper disinfectant solution

2. Prepare Chlorine Solution from Calcium Hypochlorite Powder

Solid formulations of hypochlorite (powder or granules) may also be available in a variety of settings. Solid formulations are available as concentrated, high-test hypochlorite (HTH) (65-70%) and as chlorine or calcium hypochlorite powder (35%). To produce the final desired concentration (in this case 0.5% Chlorine), the weight (in grams) of calcium hypochlorite that should be added per liter of water can be determined based on the calculation as below:

2.1 Formula,

[% Chlorine desired ∕ % Chlorine in hypochlorite powder or granules] × 1 000 = grams of calcium hypochlorite powder for each liter of water.

2.2 Example,

[0.5% Chlorine desired ∕ 35% in hypochlorite powder] × 1 000 = 0.0143 × 1 000 = 14.3

Therefore, you must dissolve 14.3 grams of calcium hypochlorite powder (35%) in each liter of water to make a 0.5% chlorine solution.

3. Safe Handling and Storage of Disinfectants  

Since chlorine can rapidly decay in solutions it is recommended to freshly prepare chlorine solutions every day. Likewise, hypochlorite is rapidly inactivated in the presence of organic material; therefore, regardless of the concentration used, it is important to first clean surfaces thoroughly with soap and water or detergent (using mechanical action such as scrubbing or friction) to remove organic matter, followed by the use of disinfecting solution. After sanitizing the surface, when you spray disinfectant solution, minimum 1 minute of contact time is recommended for it to work properly.  

Cleaners should wear adequate PPE and be trained to use it safely. When the solutions are being prepared and used, the minimum recommended PPE includes rubber gloves, eye protection, medical mask, impermeable aprons and closed shoes. The disinfectant and its concentration should be carefully selected to avoid damaging surfaces and to avoid or minimize its toxic effects on people. Be careful, as high concentrations of chlorine can lead to corrosion of metal surfaces and irritation of skin or mucous membrane.   

Disinfectant solutions should always be prepared in well-ventilated areas to ensure circulation of fresh air. You must avoid combining several disinfectants, both during preparation and usage, as such mixtures cause respiratory irritation and can release potentially fatal gases, especially when combined with hypochlorite solutions. Care must be given to store disinfectant solutions in opaque containers (in a well-ventilated and covered area) that is not exposed to direct sunlight. Please don’t forget to keep all the chemicals and solutions strictly out of reach of children.

The Article Earlier Published in https://www.spotlightnepal.com/2020/06/26/covid-19-disinfecting-your-homes-and-offices/

Also Read:

COVID-19 Outbreak: N95 Respirators

COVID-19 Outbreak: Surgical Face Masks

COVID-19 Outbreak: Cloth Face Coverings

COVID-19: Know Your Risk Level

COVID-19 Outbreak: Cloth Face Coverings

कोभिड-१९ (Covid-19) वा कोरोनाभाइरस (2019-nCoV): तयारी र रोकथामका उपायहरू

Covid-19 or Coronavirus (2019-nCoV): Preparedness and Preventive Measures

(22 August 2018) When A Fire Broke Out at the 12th Floor of a 16 Story Residential Building in Mumbai

Ensuring Occupational Health & Safety by Managing Risk

Construction Industry: Fatal (Focus-Four) Hazards

Covid-19 Pandemic: Safe Return to Work and Business Continuity

 

About Sustainable Safety Solutions, NEPAL

Environmental / Occupational Health & Safety for Planet, People and Profit.
This entry was posted in Businesses & Organizations, Covid-19, Publication, Resource and tagged , , , , , , , , , , . Bookmark the permalink.

24 Responses to COVID-19: Disinfecting Your Homes and Offices

  1. Pingback: Ensuring Occupational Health & Safety by Managing Risk | Sustainable Safety Solutions, NEPAL

  2. Pingback: Covid-19 Pandemic: Safe Return to Work and Business Continuity | Sustainable Safety Solutions, NEPAL

  3. Pingback: Construction Industry: Fatal (Focus-Four) Hazards | Sustainable Safety Solutions, NEPAL

  4. Pingback: A Business Case for Health & Safety…. | Sustainable Safety Solutions, NEPAL

  5. Pingback: (Part 1 of 4) Labour Act, 2074 (2017 AD): Occupational Health & Safety (OHS) related provisions | Sustainable Safety Solutions, NEPAL

  6. Pingback: (Part 2 of 4) Labour Act, 2074 (2017 AD): Occupational Health & Safety (OHS) related provisions | Sustainable Safety Solutions, NEPAL

  7. Pingback: (Part 3 of 4) Labour Act, 2074 (2017 AD): Occupational Health & Safety (OHS) related provisions | Sustainable Safety Solutions, NEPAL

  8. Pingback: (Part 4 of 4) Labour Act, 2074 (2017 AD): Occupational Health & Safety (OHS) related provisions | Sustainable Safety Solutions, NEPAL

  9. Pingback: National Occupational Safety and Health Policy 2076BS Nepal | Sustainable Safety Solutions, NEPAL

  10. Pingback: Air Pollution in Kathmandu: Are You Protected? | Sustainable Safety Solutions, NEPAL

  11. Pingback: Fall Restrain System Vs. Fall Arrest System | Sustainable Safety Solutions, NEPAL

  12. Pingback: Office Ergonomics: A Sound Business Investment | Sustainable Safety Solutions, NEPAL

  13. Pingback: Earthquake tragedies in Nepal and around the world | Sustainable Safety Solutions, NEPAL

  14. Pingback: Occupational Health & Safety (OHS) Provisions and Policies in Nepal: A Brief Review in Retrospect | Sustainable Safety Solutions, NEPAL

  15. Pingback: Particle Pollution or Particulate Matter (PM) | Sustainable Safety Solutions, NEPAL

  16. Pingback: (22 August 2018) When A Fire Broke Out at the 12th Floor of a 16 Story Residential Building in Mumbai | Sustainable Safety Solutions, NEPAL

  17. Pingback: Reducing Risk of Coronavirus (2019-nCoV): WHO guidelines on masks | Sustainable Safety Solutions, NEPAL

  18. Pingback: Covid-19 or Coronavirus (2019-nCoV): Preparedness and Preventive Measures | Sustainable Safety Solutions, NEPAL

  19. Pingback: A Short Story: In the name of Road Safety in Nepal! | Sustainable Safety Solutions, NEPAL

  20. Pingback: COVID-19: Know Your Risk Level | Sustainable Safety Solutions, NEPAL

  21. Pingback: COVID-19 Outbreak: Cloth Face Coverings | Sustainable Safety Solutions, NEPAL

  22. Pingback: COVID-19 Outbreak: Surgical Face Masks | Sustainable Safety Solutions, NEPAL

  23. Pingback: COVID-19 Outbreak: N95 Respirators | Sustainable Safety Solutions, NEPAL

  24. Pingback: COVID-19 Outbreak: Face Coverings Vs Surgical Masks Vs N95 Respirators | Sustainable Safety Solutions, NEPAL

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s