甲醛已经被世界卫生组织确定为致癌和致畸形物质，是公认的变态反应源，也是潜在的强致突变物之一。
Formaldehyde has been identified by the World Health Organization as a carcinogen and teratogenic substance, recognized as a source of allergic reactions and a potential strong mutagen.
甲醛具有强烈的致癌和促癌作用。大量文献记载，甲醛对人体健康的影响主要表现在嗅觉异常、刺激、过敏、肺功能异常、肝功能异常和免疫功能异常等方面。
Formaldehyde has strong carcinogenic and pro cancer effects. Numerous literature records indicate that the effects of formaldehyde on human health mainly manifest in areas such as abnormal smell, stimulation, allergies, abnormal lung function, abnormal liver function, and abnormal immune function.
长期接触低剂量甲醛危害更大，可引起慢性呼吸道疾病，引起鼻咽癌、结肠癌、脑癌、月经紊乱、细胞核的基因突变，DNA单链内交连和DNA与蛋白质交连及抑制DNA损伤的修复、妊娠综合症、引起新生儿染色体异常、白血病，引起青少年记忆力和智力下降。在所有接触者中，儿童和孕妇及老人对甲醛尤为敏感，危害也就更大。国际癌症研究所已建议将其作为可疑致癌物对待。
Long term exposure to low-dose formaldehyde poses greater risks and can cause chronic respiratory diseases, including nasopharyngeal carcinoma, colon cancer, brain cancer, menstrual disorders, genetic mutations in the cell nucleus, DNA single strand internal cross-linking and DNA protein cross-linking, as well as inhibition of DNA damage repair, pregnancy syndrome, chromosomal abnormalities in newborns, leukemia, and a decline in memory and intelligence in adolescents. Among all contacts, children, pregnant women, and the elderly are particularly sensitive to formaldehyde, and the harm is even greater. The International Cancer Institute has recommended treating it as a suspected carcinogen.
苯属致癌物质，轻度中毒会造成嗜睡、头痛、头晕、恶心、胸部紧束感等，并可有轻度粘膜刺激症状，重度中毒可出现视物模糊、呼吸浅而快、心律不齐、抽搐和昏迷。
Benzene is a carcinogenic substance. Mild poisoning can cause drowsiness, headache, dizziness, nausea, chest tightness, and may also have mild mucosal irritation symptoms. Severe poisoning can cause blurred vision, shallow and fast breathing, irregular heartbeat, convulsions, and coma.