Antioxidant · Soothing · Oil control · Anti-ageing
Epigallocatechin Gallate
Epigallocatechin Gallate
表没食子儿茶素没食子酸酯
- INCI
- Epigallocatechin Gallate
- Family
- 多酚
- Typical use level
- 0.01–0.5%
- pH window
- 3.5–5.5(偏酸更稳)
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Incompatibilities and failure points
对金属离子敏感到近乎苛刻:微量铁、铜即生成深色络合物,料体从淡黄转褐甚至墨绿,这是最常见的翻车形式,而且往往在放大生产时才第一次出现。与蛋白、多肽、水解胶原、酶类络合沉淀,并把肽的活性一起拖下去。与阳离子调理剂配伍浑浊絮凝。与碳酸氢钠、氨甲基丙醇、三乙醇胺等碱性中和剂直接接触时,滴入点的局部高pH会造成瞬间不可逆变色,搅匀也回不来。与高浓度L-抗坏血酸同体系时二者互为竞争性氧化底物,文献上说得好听,实际常表现为整体黄变更快,必须以实测为准而不是照搬。与含氧化性成分的体系不可共用。
Stability
这是全库里最不稳的品类之一。水溶液在pH高于6时降解以小时计;遇氧发生自氧化并伴随明显黄变褐变;高温、光照、微量金属三者叠加会成倍加速。工程上几乎是必须的三件套:pH锁在4.0–5.0并用缓冲对稳住、螯合剂用足(EDTA二钠一类,约0.1%)、包材必须惰性——不透光、低透氧,优先安瓶、次抛或真空泵。配料时尽量减少顶空,有条件上氮气保护。去离子水也建议照加螯合剂。稳定性判定必须用含量法跟踪,不能只看外观,因为含量掉了一半外观可能还只是淡黄。
Processing notes
投料顺序是死规矩:先把体系pH调到目标值、螯合剂加完、温度降到35℃以下,最后才投EGCG,绝不能在中和碱液附近下料。粉体在室温或不超过40℃的水/丁二醇中溶解,溶解时避免长时间高速剪切带气。不锈钢锅体有点蚀、管道有锈迹先处理再开工,取样勺与过滤网建议用非金属或316以上材质。真正的放大生产坑不是配方而是等待时间:料体配好后在罐里过夜,第二天颜色就和昨天不一样,批间色差多半出在这里,所以SOP必须写死从溶解到灌装的时限,建议当班配当班灌完。留样的第一支要取自灌装线的最后一桶,而不是罐里的第一勺。
What it addresses
把「单体纯度高、起效添加量低,但氧化速度也快得多」改为「单体纯度高、公开配方中的常见添加量更低,但氧化速度也快得多」。
Market direction
- 中国 / CN
- 作为化妆品原料常规使用,需确认原料收录状态与原料安全信息;若涉及功效方向的宣称,按对应品类的评价要求准备资料;以最新官方文本为准。
- 欧盟 / EU
- 欧盟框架下作为化妆品成分常规使用,安全评估需覆盖纯度与残留溶剂;以最新官方文本为准。
- 美国 / US
- 美国按化妆品管理常规使用,关注成分安全支持文件与标签准确性,以及设施与产品登记义务;以最新官方文本为准。
- 亚太 / APAC
- 日韩及东南亚主要市场普遍可用,需按各国原料目录与宣称管理制度逐一复核;以最新官方文本为准。
Listing in the China inventory
- Inventory no.
- 01367
- Standard Chinese name
- 表棓儿茶酚棓酸酯
- Max historical use, rinse-off
- 1.25%
- Max historical use, leave-on
- 0.5%
- Source
- 国家药监局 2021 年第 62 号公告 · 已使用化妆品原料目录(2021年版)
Status by market inventory (exact INCI match)
- 中国 · Inventory of Existing Cosmetic Ingredients in China (2021)
- Listed (01367)
- 印尼 · BPOM Technical Requirements for Cosmetic Ingredients (PerBPOM 17/2022)
- Not listed
- 中国 · Safety and Technical Standards for Cosmetics — prohibited and restricted
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- 欧盟 · CosIng — European Commission cosmetic ingredient database
- Listed (56148) · 功能 ANTIOXIDANT
- 欧盟 · Regulation (EC) No 1223/2009 — Annexes II to VI
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- 东盟 · ASEAN Cosmetic Directive — Annexes
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- 美国 · FDA prohibited and restricted cosmetic ingredients; color additives
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- 加拿大 · Cosmetic Ingredient Hotlist
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- 日本 · Standards for Cosmetics — appended tables
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- 韩国 · Regulation on Safety Standards for Cosmetics
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- 巴西 · ANVISA cosmetic ingredient restrictions and positive lists
- Not on the prohibited/restricted list — not the same as unrestricted; check the full text and the responsible person
- Matched on the exact INCI name; salts, esters and synonyms may be missed. The latest official text prevails.
Basics
- Synonyms and botanical name
- EGCG,绿茶儿茶素单体,Epigallocatechin Gallate,Camellia sinensis 来源
- CAS
- 989-51-5
- Suits formats
- Serum · Essence · Toner · Gel · Sheet mask · Lotion
- Halal and vegan
- 多为茶叶提取纯化所得,通常可做vegan主张;需确认纯化工艺助剂无动物源,清真需供应商出具证明。
- Cost band
- Premium
- Evidence strength
- 高
Others in this family
- Imagery pendingCamellia Sinensis Leaf ExtractAntioxidant
- Imagery pendingLonicera Japonica Flower ExtractSoothing
- Imagery pendingRhodiola Rosea Root ExtractAntioxidant
- Imagery pendingVitis Vinifera Seed ExtractAntioxidant
- Imagery pendingPolygonum Cuspidatum Root ExtractAntioxidant
- Imagery pendingPunica Granatum Fruit ExtractAntioxidant
Compiled from published formulation knowledge and factory experience for selection reference. Not an efficacy claim; use levels describe common published ranges, not regulatory limits; market availability is governed by the latest official texts and reviewed by the brand and its responsible person.