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Methylisothiazolinone in Cleaning Products

A potent preservative and known skin sensitizer.

Also known as: mi, mit, cmit/mit, methylchloroisothiazolinone

CAS #: 2682-20-4

Puppy Safety
4.0
Adult Dog Safety
5.0
Paw Safety
4.0
Respiratory Safety
6.0
Licking Risk
5.0
Environmental
5.0
Ingredient Transparency
—
Cleaning Performance
—

What should dog owners know about Methylisothiazolinone?

Clean Wise evaluates Methylisothiazolinone by the published ingredient reference and its dog-exposure sub-scores. Those scores help describe expected concern around paws, licking, breathing and age groups; they do not make a universal “safe” or “unsafe” claim for every concentration, product or use.

What this means for your dog

Plain-language read of the sub-scores above.

  • Around puppiesExtra care recommended around puppies. Consider a gentler alternative or keep puppies away until surfaces are fully dry.
  • Around pawsHigher potential for paw irritation. Rinse thoroughly and consider a paw wipe after contact.
  • If lickedDo not let dogs lick treated surfaces. Rinse well and store securely; call your vet or poison line if ingested.
  • In the airVentilate the room during and after use — open a window or run a fan.

Why brands use it

preservative

Found in these product types

Products containing Methylisothiazolinone

Nature Clean · Dish Soaps
Nature Clean Automatic Dishwasher Gel - 1.8L
6.3
Method · Floor Cleaners
Method Squirt + Mop Almond Floor Cleaner
5.2
Mrs. Meyer's · Air Fresheners
Mrs. Meyer's Room Freshener Lavender
4.9
Mrs. Meyer's · Bathroom Cleaners
Mrs. Meyer's Tub & Tile Cleaner
6.6
Method · Floor Cleaners
Method Squirt + Mop Hard Floor Cleaner
6.0
Nature Clean · Laundry Detergents
Nature Clean Laundry Concentrate - 1L – Lavender
8.6
Nature Clean · Laundry Detergents
Nature Clean Laundry Liquid - 3L - White Lily & Moroccan Myrrh
6.2
Nature Clean · Laundry Detergents
Nature Clean Laundry Liquid - 3L - Fragrance Free
7.4
Better Life · Glass Cleaners
Better Life See Clearly Glass Cleaner
2.1
Hartz · Dog Shampoos
Hartz Groomer's Best Oatmeal Shampoo
1.5
Glade · Air Fresheners
Glade Aerosol Air Freshener
1.1
Nature Clean · Laundry Detergents
Nature Clean Laundry Liquid - 3L - Lavender
7.2
Glade · Air Fresheners
Glade Aerosol Spray Clean Linen
1.1
Nature Clean · Laundry Detergents
Nature Clean Laundry Concentrate - 1L – Lemon Verbena
8.6
Nature Clean · Laundry Detergents
Nature Clean Laundry Concentrate - 1L - Fragrance Free
8.6
Woolite · Laundry Detergents
Woolite Delicates Liquid
2.3
Purex · Laundry Detergents
Purex Free & Clear Liquid
2.3
Seventh Generation · Laundry Detergents
Seventh Generation Free & Clear Laundry
2.3
Nature Clean · Laundry Detergents
Nature Clean Laundry Liquid - 3L - Lemon Verbena
8.5
Fleecy · Fabric Softeners
Fresh Air Liquid Fabric Softener
4.2
Fleecy · Fabric Softeners
Calm Liquid Fabric Softener (Vanilla & Honey Lotus)
4.2
Fleecy · Fabric Softeners
Sensations Brazilian Paradise Liquid Fabric Softener
4.2
Fleecy · Fabric Softeners
Shed Shield Pet Hair & Odor Fabric Conditioner
4.2
Fleecy · Fabric Softeners
Plus Fresh Air Liquid Fabric Softener
4.2
Fleecy · Fabric Softeners
Odor Shield Liquid Fabric Softener
4.9
Fleecy · Fabric Softeners
Sensations Hawaiian Escape Liquid Fabric Softener
4.2
Fleecy · Fabric Softeners
Pure Balance Rosewater Liquid Fabric Softener
4.2
Fleecy · Fabric Softeners
Sensations Lavender Liquid Fabric Softener
4.4
Fleecy · Dryer Sheets
Sensations Lavender Dryer Sheets
4.4
Nellie's · Dog Shampoos
One Soap — Plastic Bottle Formula
6.9
John Paul Pet · Dog Shampoos
John Paul Pet Oatmeal Shampoo
6.4
Ajax · Dish Soaps
Ajax Ultra Triple Action Dish Liquid Orange
5.1
Better Life · Dish Soaps
Better Life Dish Soap
4.7
Better Life · Kitchen Cleaners
Better Life What-Ever! All-Purpose Cleaner
6.1
Better Life · Floor Cleaners
Better Life Naturally Dirt-Destroying Floor Cleaner
4.3

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Sources

CleanWise provides educational information to help dog owners make informed household choices. Scores are based upon ingredient transparency, intended use and currently available information. Individual dogs may have different sensitivities. Always follow manufacturer instructions.