chemical · input
HPMC / CMC (Hydroxypropyl Methylcellulose / Carboxymethylcellulose)
Cellulose-derived viscosity/mucoadhesive agents used at 0.2–0.5% in artificial tears. Multiple global suppliers (Dow, Shin-Etsu, Indian/Chinese producers). Not critically concentrated — substitutable across formulations.
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Source countries
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Companies
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Goods affected
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Claims on record
What depends on it
Goods that need this input
1 essential American goods rely on hpmc / cmc (hydroxypropyl methylcellulose / carboxymethylcellulose) somewhere upstream in their supply chain.