Exposure to Hazardous Chemicals in Infancy and Early Childhood

Infants and children up to four years of age spend a significant portion of their day in their sleeping microenvironment (SME), which can include mattresses, pillows, toys, bedding materials, and the surrounding air. This prolonged exposure to potentially hazardous substances raises concerns about the safety of everyday objects that are often taken for granted. Recent studies have reported that SMEs often contain harmful chemicals, including volatile organic compounds (VOCs), semivolatile organic compounds (SVOCs), and biological contaminants.

Key Findings of the Study

• The study found that many children’s mattresses release high levels of hazardous chemicals during sleep. • SVOCs, such as stain repellents, plasticizers, and flame retardants, have been detected in many mattresses. • The researchers detected 21 SVOCs in 16 mattresses, with detection frequencies (DFs) of 88% for tris(2-butoxyethyl) phosphate (TBOEP) and 6.3% for tris (2-isopropyl phenyl) phosphate (T2IPPP). • The presence of SVOCs was found to be associated with the type of polymer used in the cover, as well as the country in which the mattress components were manufactured.

Exposure Risks and Health Impacts

Children’s exposure to certain SVOCs, such as ortho-phthalates (PAEs) and certain organophosphate esters (OPEs), increases the risk of allergic diseases like asthma. These chemicals can also trigger adverse neurobehavioral outcomes, including effects on cognitive ability, prosocial behavior, and working memory.

Factors that Increase Exposure

• The study found that the migration of SVOCs from mattresses can occur due to their passive diffusion to a lower fugacity, thereby achieving chemical equilibrium. • The researchers also found that the SVOC inhalation rate among children is 10 times higher than that of adults. • Children’s movements through shifting positions while sleeping or bouncing on a mattress also accelerate SVOC migration, which subsequently increases exposure to these harmful chemicals.

Recommendations for Manufacturers and Regulators

• Manufacturers should improve the oversight of their products so that they do not violate regulations, that they comply with their own product certifications, improve manufacturing practices so that unintended contamination is minimized, and that such chemicals are not used when not needed. • Regulators should update current regulations to restrict children’s exposure to harmful chemicals and enforce stricter safety standards for children’s products.

Conclusion

Mattresses are a significant source of SVOC exposure to young children in their SMEs, emphasizing the need to update current regulations to restrict children’s exposure to harmful chemicals. Further studies using larger sample sizes are needed to validate these findings and to provide a comprehensive understanding of the risks associated with exposure to SVOCs in infants and children.

References

• Canadian Environmental Protection Act, 1999
• United States Environmental Protection Agency

While this study highlights the risks associated with exposure to SVOCs in infants and children, it is essential to note that the results of this study may be influenced by the limited sample size and the specific SVOCs tested.

However, the findings of this study emphasize the need for further research into the exposure risks associated with SVOCs in infants and children and for the development of stricter safety standards for children’s products.

Ultimately, the safety of infants and children in their sleep environment depends on the development and implementation of effective regulations and guidelines that restrict exposure to harmful chemicals.

Example of SVOC Contamination

For example, a child’s mattress may contain high levels of BzBP, which can be released into the air when the child moves or sleeps on the mattress.