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.

Harris 12 Concentrated Hydrogen Peroxide 128oz For Kitchen Bath Laundry

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Description

✨ Elevate your clean game with pro-strength purity 💧

STAIN SLAYER - Effortlessly lifts tough stains from fabrics, carpets, and upholstery.
PRECISION POURING - Included easy-fill funnel guarantees mess-free, accurate transfers every time.
POWERHOUSE CLEANSER - 12% concentration delivers industrial-grade cleaning power for every surface.
VERSATILE FRESHNESS - Neutralizes odors naturally—no artificial scents, just pure freshness.
ECONOMY MEETS EFFICIENCY - 128oz bottle ensures long-lasting supply, cutting down on frequent repurchases.

HARRIS 12% Concentrated Hydrogen Peroxide is a powerful, multi-purpose cleaning solution designed for kitchen, bath, laundry, and garden use. Its high 12% concentration offers superior stain removal and odor neutralization without harsh chemicals. The generous 128oz bottle paired with an easy-fill funnel ensures economical, precise, and versatile application, trusted by households since 1922.

Specifications

ASIN	B0BL8C5P7G
Best Sellers Rank	#7,379 in Health & Household ( See Top 100 in Health & Household ) #108 in All-Purpose Household Cleaners
Brand	HARRIS
Brand Name	HARRIS
Container Type	Bottle
Contains Liquid Contents?	Yes
Customer Reviews	4.7 out of 5 stars 2,327 Reviews
Global Trade Identification Number	00072725014143
Item Form	Liquid
Item Volume	128 Fluid Ounces
Manufacturer	Harris
Material Feature	Eco-Friendly
Material Features	Eco-Friendly
Model Number	GL61B0750489
Number of Items	1
Part Number	GL61B0750489
Scent	Unscented
Size	128 Fl Oz (Pack of 1)
Special Features	All Purpose, Concentrated, Food Grade, For Mirrors, Glass, Carpet, Laundry, Marble, Grout, Stainless Steel, Shower, Floor, Windows, Kitchen and Bath, Low Odor
Specific Uses For Product	Countertop
Surface Recommendation	Glass
UPC	072725014143
Unit Count	128.0 Fluid Ounces

Reviews

C**D

26.03.2026

E**D

18.06.2025

T**K

8.03.2026

K**N

12.10.2025

E**L

17.04.2026

B**L

28.04.2026

R**A

26.03.2026

A**W

24.01.2026

A**W

26.11.2025

N**H

11.10.2025

C**.

27.05.2025

L**L

25.10.2024

J**G

13.10.2025

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14155 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

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

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