Exclusively NPN-certified, Thursday Plantation Tea Tree Oil is a powerful, natural antiseptic with 40% terpinen-4-ol, surpassing the standard 30% found in other brands. Terpinen-4-ol is the key component that makes tea tree oil an effective germicide, providing broad-spectrum protection. Our tea tree oil is sourced from Australia and is known for its superior antiseptic qualities, trusted by health professionals globally.