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Are heavy metals and pesticide residues tested on wintersweet flower wax?

Yes — every batch is tested for heavy metals and pesticide residues by an accredited third-party laboratory.

Typical limits (aligned with industry and destination requirements):

ParameterLimit
Lead (Pb)≤ 3 mg/kg
Arsenic (As)≤ 2 mg/kg
Mercury (Hg)≤ 1 mg/kg
Cadmium (Cd)≤ 0.5 mg/kg
Total pesticide residuesConforms to destination country (EU/US) limits
Sourcing from certified cultivation areas with controlled agronomic practices keeps residue levels well below limits. Reports are issued per batch and included with the COA. If your market has stricter thresholds, we can test against your specification.

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This article was published on 2026-09-07, and last updated on 2026-09-07. The article will be continuously updated.

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Guilin Four Seasons Sunshine

Founded in 2006, Guilin Four Seasons Sunshine F&F Co., Ltd. is a natural plant extract manufacturer and OEM/ODM partner in Guilin, China, combining proprietary Living-Fragrance physical extraction with supercritical fluid extraction to deliver pure, traceable botanical ingredients to global food, flavor, fragrance and personal care brands.