Titanium Dioxide Toxicity - Health Effects, First Aid, and Prevention

Introduction

Titanium dioxide (TiO2) is used as a UV (ultraviolet) filter or whitening ingredient in a number of personal care products, including pressed powders, loose powders, and sunscreens. Negative health effects are not a possibility when using lotions and creams (dermal exposure). The International Agency for Research on Cancer (IARC), however, classifies titanium dioxide as a potential carcinogen when it is inhalable, as it may be when it is in powder form. Nanoparticles of titanium dioxide do not appear to pose any special health risks.

What Is Titanium Dioxide?

Natural occurrences of titanium dioxide (TiO2) include a thin white powder or dust. In 1923, it was first purposefully created for use as a white pigment.

Since it is inherently opaque and bright, it is beneficial for use in paper, ceramics, rubber, textiles, paints, inks, and cosmetics. It is also UV (ultraviolet) light resistant and is frequently found in sunscreens and pigments that are subject to UV rays. It is employed in a wide variety of personal care products, such as sunscreens, loose and pressed powders, eye shadow, blush, and other color cosmetics. Titanium dioxide can take on a variety of forms with various characteristics. Certain forms can be transformed into nanomaterials. Early in the 1990s, micronized TiO2—also known as nano or nanoparticles was developed. Both the terms nanotechnology and micronization describe the process of reducing a given material's particle size. The word nanoparticles often refers to particles smaller than 100 nanometers. A nanometer is one billionth of a meter. Titanium dioxide is transparent at these small particles and low concentrations, making it possible to create effective sunscreens that do not appear white.

What Variations of Titanium Dioxide Are There?

Depending on whether TiO2 is created as a pigment or a nanomaterial, it has distinct properties. Both forms are insoluble, tasteless, and odorless. The size range of pigmentary TiO2 particles, which make up 98 percent of the manufacturing, is between 200 and 350 nm (nanometer). It is primarily employed in applications involving surface opacity and light scattering. It serves as a foundation for several different color paints or stands alone as a brilliant white.

Primary TiO2 particles are nanoscale or less than 100 nm in size. Compared to pigmentary titanium dioxide with bigger particle sizes, this grade of titanium dioxide is clear (colorless) and has superior UV scattering and absorption qualities.

What Components Makeup Titanium Dioxide?

Titanium is a metal that is widely used on Earth, yet it does not normally exist in its basic state. The naturally occurring substance produced when titanium combines with the oxygen in the air is known as titanium (IV) oxide (also known as titania) or TiO2. Titanium is a mineral that is present in the crust of the planet as an oxide. It may also be present in mixtures with other substances, such as calcium and iron. TiO2 is frequently regarded as being chemically inert since it does not react with other chemicals, making it a stable product that may be used in a range of industries and applications.

What Possible Negative Impacts on Health Could Titanium Dioxide Have?

Principal exposure routes are skin contact, eye contact, and inhalation.

• Inhalation: High quantities inhaled through the mouth or nose might irritate the throat and nose.

• Skin Contact: Patients might have a little rash.

• Eye Contact: As a foreign object, it could cause a little irritation. While debris is being rinsed from the eye by tears, there may be tears, blinking, and minor momentary pain.

• Ingestion: This compound is not dangerous when consumed.

• Long-Term (Chronic) Effects Exposure: The few available research do not allow for conclusions to be made.

• Potential Carcinogen: Animal data suggest that it might cause cancer.

• ARC (International Agency for Research on Cancer): Group 2B - possibly carcinogenic (cancer-causing) to humans. The ACGIH is the American Conference for Governmental Industrial Hygienists. A3- known to cause cancer in animals.

• Teratogenicity or Embryotoxicity: No known effects on the developing fetus.

• Reproductive Toxicity: There are no recognized risks to reproduction.

• Mutagenicity: No evidence exists that this substance is mutagenic (ability to induce genetic mutation).

What Are Titanium Dioxide First Aid Procedures?

The first aid procedures for titanium dioxide exposure are:

• Inhalation: Before trying to perform a rescue, take care to assure safety (for example, don the proper protective gear). Get the victim outside.

• Skin Contact: Quickly and delicately wipe or remove any surplus chemical off skin contact. With gently flowing water and non-abrasive soap, wash delicately and thoroughly.

• Eye Contact: Avoid making eye contact and quickly and delicately wipe or brush chemicals from the face. Pour softly flowing water into the affected eyes right away, sometimes elevating the upper and lower eyelids. Consult a doctor if the discomfort or irritation does not go away.

• Drinking: Have the victim rinse their mouth out with water. Victims should seek medical assistance if they feel ill.

• First Aid Remarks: If exposed or worried, consult a doctor for guidance. A medical expert acquainted with the chemical and its usage circumstances at work should periodically review all first aid protocols.

What Are the Titanium Dioxide Unintended Release Control Measures?

• Personal Safety Advice: Refrain from allowing superfluous or exposed workers near the spill location. When necessary, wear personal protection equipment.

• Containment and Cleanup Techniques: Refrain from creating dust. Collect with a shovel or scoop or a HEPA vacuum that has been permitted and store in an appropriate container for disposal. Do not sweep dry. If necessary, use a dust suppressor, like water. Never clean with pressurized air.

How Should Titanium Dioxide Be Handled and Stored While Working With It?

1. Handling:

• Before handling, it is crucial to ensure that all engineering controls are in operation, that the necessary protective gear is being worn, and that personal hygiene precautions are being taken.

• Report any leaks, spills, or equipment malfunctions (such as a ventilation system) right away.

• Do not produce dust.

• When not in use or when empty, keep containers tightly closed.

• Avoid accidental contact with noxious substances.

2. Storage: Place items in containers that are firmly shut and clearly labeled.

Conclusion

Titanium dioxide (TiO2) is a naturally occurring titanium oxide with very little biological impact and low toxicity. Normal-sized (more than 100 nm) titanium dioxide particles (TiO2-NPs) are now able to be widely employed in food products, as well as ingredients in a variety of pharmaceuticals and cosmetics, such as toothpaste and sunscreen, due to their classification as bio-inert materials. As a result, during both the production process and use, human exposure could happen by ingestion, skin penetration, or through inhalation. Ultimately, additional study is required to completely comprehend the toxicological interactions of these NPs (nanoparticles) with biological systems at the cellular, molecular, and organ levels. TiO2 NP risk management includes interpreting and conveying information about hazards and risks.