HEDP
1-Hydroxyethylidene-1,1-diphosphonic acid
CAS number: 2809-21-4
Scale control & chelation
Water-treatment chemicals from Qing Shui Yuan. H2Q INC. handles U.S. sales, service, quotations and sales contracts.

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Explore the catalog 02 / EXPLORE AN APPLICATIONStart with your operating context and technical requirements.
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Bring the application into the discussion so chemistry and requirements can be considered together.
QING SHUI YUAN · MANUFACTURER IMAGERYCONFIDENCE COMES FROM EVIDENCE
H2Q connects product inquiries with Qing Shui Yuan’s water-treatment chemical manufacturing background. We help coordinate product information, document review and supply discussions.
FROM QUESTION TO NEXT STEP
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A BETTER-INFORMED DECISION
Understand the role of a TDS, SDS and batch COA before requesting a file.
Read the guide PROCUREMENT GUIDEThe six details that help move an inquiry from a name to a practical next step.
Read the guide TECHNICAL BUYINGCompare PBTC, ATMP and HEDP procurement references, then review reporting bases, test conditions and grade-specific limits for phosphonates and polymers.
Read the guide