Products are split into three levels based on ingredient labels

GO
Best choice
SLOW
Contains ingredients with possible health concerns
STOP
Contains harmful ingredients
STOP

CHI

44 Iron Guard (Thermal Protection Spray)

Last verified: February 18, 2026

  • Water
  • Sodium Polystyrene Sulfonate
  • Alcohol Denat.
  • Polysorbate 20
  • Propanediol
  • Cocodimonium Hydroxypropyl Hydrolyzed Keratin
  • Hydrolyzed Silk
  • Caprylyl Glycol
  • Phenoxyethanol
  • PPG-20 Methyl Glucose Ether
  • Potassium Sorbate
  • Hexylene Glycol
  • Citric Acid
  • Alumina
  • Silica
  • Fragrance (Parfum)
  • Benzyl Benzoate
  • Citronellol
  • Hexyl Cinnamal
  • Titanium Dioxide (CI 77891)

Why This Product is Rated STOP

44 Iron Guard (Thermal Protection Spray) by CHI has been evaluated by Million Marker and contains ingredients with known health concerns. This product is rated STOP, indicating higher concern.

We recommend avoiding STOP-rated products and seeking safer alternatives from our GO or SLOW categories.

Learn more about how Million Marker scores products →

Frequently Asked Questions

44 Iron Guard (Thermal Protection Spray) by CHI - Non-toxic Hair Styling + Treatment product rated STOP by Million Marker, free from BPA, phthalates, and parabens

Where to buy

CHI Google Search

More from CHI

Volumecare Volumizing Shampoo by CHI - Non-toxic, STOP rated product free from harmful chemicals
STOP

CHI

Volumecare Volumizing Shampoo

Tea Tree Oil Shampoo by CHI - Non-toxic, STOP rated product free from harmful chemicals
STOP

CHI

Tea Tree Oil Shampoo

Rose Hip Oil Protecting Conditioner by CHI - Non-toxic, STOP rated product free from harmful chemicals
STOP

CHI

Rose Hip Oil Protecting Conditioner

Infra Moisture Therapy Shampoo by CHI - Non-toxic, STOP rated product free from harmful chemicals
STOP

CHI

Infra Moisture Therapy Shampoo

Enviro 54 Hairspray by CHI - Non-toxic, STOP rated product free from harmful chemicals
STOP

CHI

Enviro 54 Hairspray

Rose Hip Color Recovery Treatment by CHI - Non-toxic, STOP rated product free from harmful chemicals
STOP

CHI

Rose Hip Color Recovery Treatment

More in Hair Styling + Treatment

Mustache Wax, Medium Hold by Badger - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

Badger

Mustache Wax, Medium Hold

Wooden Italian Hair Brush by Qet Botanicals - Non-toxic, GO rated product free from harmful chemicals
GO

Qet Botanicals

Wooden Italian Hair Brush

Auburn Henna Hair Dye by Henna Color Lab - Non-toxic, GO rated product free from harmful chemicals
GO

Henna Color Lab

Auburn Henna Hair Dye

Beard Wash by Shea Moisture - Non-toxic, STOP rated product free from harmful chemicals
STOP

Shea Moisture

Beard Wash

Shea Moisturizer by Nuele Hair - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

Nuele Hair

Shea Moisturizer

Light Brown Henna Hair Dye by Henna Color Lab - Non-toxic, GO rated product free from harmful chemicals
GO

Henna Color Lab

Light Brown Henna Hair Dye

Moisture Infusion Hair Treatment by CROWN ELEMENTS - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

CROWN ELEMENTS

Moisture Infusion Hair Treatment

Mahogany Henna Hair Dye by Henna Color Lab - Non-toxic, GO rated product free from harmful chemicals
GO

Henna Color Lab

Mahogany Henna Hair Dye

Solid Shampoo for Dry Hair - Mango by LA Miss Apple - Non-toxic, GO rated product free from harmful chemicals
GO

LA Miss Apple

Solid Shampoo for Dry Hair - Mango

Pure Indigo Hair Dye by Henna Color Lab - Non-toxic, GO rated product free from harmful chemicals
GO

Henna Color Lab

Pure Indigo Hair Dye

More in Bath + Body

Amla Extract Color Protecting Conditioner by Dr. Locs - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

Dr. Locs

Amla Extract Color Protecting Conditioner

Oatmeal Sensitive Natural Volume & Shine Shampoo - Unscented by ATTITUDE - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

ATTITUDE

Oatmeal Sensitive Natural Volume & Shine Shampoo - Unscented

Marine Bio-Active Shampoo by Hairprint - Non-toxic, GO rated product free from harmful chemicals
GO

Hairprint

Marine Bio-Active Shampoo

Amla Butter Conditioner by Hairprint - Non-toxic, GO rated product free from harmful chemicals
GO

Hairprint

Amla Butter Conditioner

Garnier Fructis Sleek & Shine Smoothing Shampoo by Garnier - Non-toxic, STOP rated product free from harmful chemicals
STOP

Garnier

Garnier Fructis Sleek & Shine Smoothing Shampoo

Oatmeal Sensitive Natural Volume & Shine Shampoo - Chamomile by ATTITUDE - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

ATTITUDE

Oatmeal Sensitive Natural Volume & Shine Shampoo - Chamomile

Moisturizing Cream Shampoo with Shea Butter by cantu - Non-toxic, STOP rated product free from harmful chemicals
STOP

cantu

Moisturizing Cream Shampoo with Shea Butter

Rhassoul Bentonite Clay Shampoo Bar by Bask and Bloom Essentials - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

Bask and Bloom Essentials

Rhassoul Bentonite Clay Shampoo Bar

Scalp Revival Dandruff Relief Shampoo by Briogeo - Non-toxic, SLOW rated product free from harmful chemicals
SLOW

Briogeo

Scalp Revival Dandruff Relief Shampoo

Curl Enhancing Conditioner by Argan Oil From Morocco - Non-toxic, STOP rated product free from harmful chemicals
STOP

Argan Oil From Morocco

Curl Enhancing Conditioner