Zonrox traces its origins to the early years of Green Cross Inc., which was founded in 1952 by Chinese-Filipino entrepreneur Co Ay Tian. After the success of Green Cross Rubbing Alcohol, the company expanded into home sanitation by introducing Zonrox Bleach. Through extensive consumer education and advertising campaigns demonstrating its many household uses, Zonrox quickly became a staple in Filipino homes. [2]

Historical accounts indicate that the bleach product was first developed in the 1950s, with the Zonrox trademark later registered in the Philippines. The brand has since remained one of Green Cross Inc.’s flagship products despite later trademark and ownership disputes within the founding family. [3]

• Brand Name: Zonrox

• Owner: Green Cross Inc.

• Founded: 1950s

• Country of Origin: Philippines

• Industry: Household Cleaning Products

• Product Category: Bleach, disinfectants, laundry care, and surface cleaners

• Market: Primarily the Philippines

Over the years, Zonrox has expanded beyond traditional chlorine bleach into several cleaning categories, including:

• Original Bleach – Chlorine bleach for whitening clothes and disinfecting surfaces.

• Color Safe Bleach – Oxygen-based bleach designed for colored fabrics.

• Multi Clean – Multi-purpose household cleaner.

• GentleClean – Bleach-based cleaner formulated for everyday household use.

• Other specialized cleaning and disinfecting products introduced under the Zonrox brand. [4]

Zonrox products are commonly used for:

• Whitening white clothing

• Removing stains from fabrics

• Disinfecting bathrooms and toilets

• Cleaning kitchen surfaces

• Sanitizing floors and tiles

• Eliminating odors

• Household surface cleaning

Many Filipinos also use diluted bleach solutions for sanitation following the manufacturer’s directions.

One of Zonrox’s greatest strengths has been consumer education. Rather than simply advertising bleach as a laundry product, Green Cross promoted its use for:

• Household disinfection

• Bathroom cleaning

• Kitchen sanitation

• Fabric whitening

• Germ protection

These educational campaigns helped establish Zonrox as an everyday household essential across generations of Filipino consumers. [5]

Zonrox is considered one of the leading bleach brands in the Philippines. It competes with international and local cleaning brands but remains especially well known due to its long history, widespread availability, and strong brand recognition.

The brand has become so familiar that many Filipinos casually use “Zonrox” to refer to bleach in general, even when describing products from other manufacturers—a sign of strong market recognition, though “Zonrox” remains a registered trademark. [6]

Green Cross Inc. is a Philippine consumer goods company specializing in health, hygiene, personal care, and home care products. Besides Zonrox, the company also markets brands such as Green Cross Alcohol, Green Cross Soap, Green Cross Sanitizing Gel, Greenex, Lewis & Pearl, and Del Fabric Softener. [7]

For more than six decades, Zonrox has been one of the Philippines’ most trusted cleaning brands. Its emphasis on hygiene education, broad product range, and consistent household presence has made it a significant part of Filipino home care culture. Today, it continues to be one of Green Cross Inc.’s flagship brands and remains widely recognized for its role in laundry care, cleaning, and sanitation. [8]

1. Green Cross Inc. » WHO WE ARE

2. Green Cross Inc. » OUR BRANDS

3. DE JESUS MANIMTIM & ASSOCIATESCounsel for the Petitioner

4. An Open Letter to the President Benigno S. Aquino III for Fairplay in an Intellectual Property Case – Philippine Daily Inquirer – The Greencross Saga

5. Curious about toilet cleaning habits in the Philippines

6. Green Cross Case Goes to IPO – Philippine Daily Inquirer – The Greencross Saga

7. The Green Cross Alcohol Saga – Manila Bulletin – The Greencross Saga

8. Our History