How much to use in a half gallon

It depends on what you are using it for. If you are diluting it to 3% then I dilute the 12% to 6% with an equal amount of water, and then dilute the 6% with an equal amount of water to get 3%. OR --- 4 oz of water to 4 oz of 12 % peroxide is 8 oz of 6% peroxide; 8 oz of 6% peroxide mixed with 8 oz of water is 16 oz of 3% peroxide. Most household uses don't call for more than 3% peroxide, but you can figure out what percentage you want and mix it with water accordingly. I keep a "whitening bucket" filled with water, some detergent, about 4oz of 12% peroxide in which I toss my white laundry items - wash cloths, dish towels, socks, bras, handkerchiefs, undershirts, T-shirts, and so on. Anything that needs whitening goes into the bucket and the entire bucket goes into the washing machine.

I want to brighten the surface of a bathtub that has a non-slip coating in areas, which has discolored, will this help?

It works like a bleach. I would mix it half the hydrogen peroxide and half with water. Try a small area and see how it works. Mix only a small amount for the first time.

Can you use this to pour down your drains in the bathroom and kitchen to kill drain gnats?

I don’t know but I have pored it down my drains

No, but the oder is not strong.

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HARRIS 12% Concentrated Hydrogen Peroxide, 128oz, for Kitchen, Bath, Laundry, Home and Garden with Easy Fill Funnel

Product ID: 511041068

Details

Brand
HARRIS
Item Form
Liquid
Material Feature
Unscented
Scent
Unscented
Specific Uses For Product
All Purpose

⚡4x stronger than standard peroxide

🧼Oxygen-powered deep stain lift

♻️Multi-surface & refillable

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Description

✨ Elevate your clean game with oxygen power! 🧪

OXYGEN POWERED CLEAN - Fizzing action penetrates deep stains—goodbye pet messes and red wine disasters.
SAFE UNSCENTED FORMULA - Bleach-free and pet-safe when used as directed—clean confidently without harsh chemicals.
ECO FRIENDLY REFILL SYSTEM - Replace dozens of cleaners by mixing your own solutions at home with the easy-fill funnel.
POWERFUL 12 CONCENTRATION - Cut through grease and grime with 4x the strength of regular peroxide for a spotless home.
VERSATILE MULTI SURFACE USE - From kitchen counters to carpets, grout to upholstery, one bottle does it all.

HARRIS 12% Concentrated Hydrogen Peroxide is a bleach-free, ultra-strong cleaning powerhouse designed for multi-surface use. Its oxygen-fueled fizzing action lifts tough stains and grime from laundry, kitchen, bath, and outdoor areas. With a generous 128oz size and easy-fill funnel, it replaces multiple cleaners, offering an eco-friendly, safe, and unscented solution trusted by thousands of users.

Specifications

ASIN	B0BL8C5P7G
ASIN	B0BL8C5P7G
Best Sellers Rank	#12,845 in Health & Household ( See Top 100 in Health & Household ) #194 in All-Purpose Household Cleaners
Brand Name	HARRIS
Capacity	128 Fluid ounces
Cleaning Agent Formulation	Degreaser, Disinfectant, Stain Remover
Container Type	Bottle
Contains Liquid Contents?	Yes
Customer Reviews	4.7 4.7 out of 5 stars (2,443)
Date First Available	November 2, 2022
Global Trade Identification Number	00072725014143
Item Form	Liquid
Item Volume	128 Fluid Ounces
Item model number	GL61B0750489
Manufacturer	Harris
Manufacturer	Harris
Material Features	Unscented
Material Type Free	Bleach Free
Model Number	GL61B0750489
Number of Items	1
Package Dimensions	12 x 6 x 6 inches; 9.02 Pounds
Package Size Name	Gallon
Part Number	GL61B0750489
Product Benefits	Concentrated, Grease and Grime Removal, Laundry Booster, Stain Remover
Recommended Uses For Product	Fizzing action powerfully penetrates & lifts tough stains for an oxygen-powered, whole-home clean. Not for pesticidal use.
Scent	Unscented
Size	128 Fl Oz (Pack of 1)
Special Features	Concentrated, Multi Purpose, Residue Free, Streak Free
Special Ingredients	Hydrogen Peroxide
Specific Uses For Product	All Purpose, Bathroom and Kitchen Surfaces, Fabric, Carpet and Upholstery, Floor, Grout, Tile
Surface Recommendation	Fabric, Carpet, Glass, Tile, Grout, Flooring, Kitchen and Bathroom Surfaces
UPC	072725014143
Unit Count	128.0 Fluid Ounces

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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866 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Romania.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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