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Antiscalants and dispersants

Hydroxymethanediphosphonic acid

Also known as MHDP, Oxidronic acid, [hydroxy(phosphono)methyl]phosphonic acid

CAS 15468-10-7Formula CH6O7P2Molar mass 192.00 g/mol
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Hydroxymethanediphosphonic acid chemical structure, CH6O7P2, CAS 15468-10-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
15468-10-7
Formula
CH6O7P2
Molar mass
192.00 g/mol
HS code
293149
Category
Antiscalants and dispersants

What is Hydroxymethanediphosphonic acid?

Plain description, key identifiers and synonyms

Oxidronic acid is a 1,1-bis(phosphonic acid).

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[hydroxy(phosphono)methyl]phosphonic acid
CAS number
15468-10-7 CAS number cross-checked
Molecular formula
CH6O7P2
UNII
71MR4V32TI
InChIKey
HJZKOAYDRQLPME-UHFFFAOYSA-N
InChI
InChI=1S/CH6O7P2/c2-1(9(3,4)5)10(6,7)8/h1-2H,(H2,3,4,5)(H2,6,7,8)
SMILES (canonical and isomeric)
C(O)(P(=O)(O)O)P(=O)(O)O

Synonyms

  • MHDP
  • Oxidronic acid
  • [hydroxy(phosphono)methyl]phosphonic acid
  • HMDP
  • Oxidronate
  • Acido oxidronico
  • Acide oxidronique
  • HMD-P
  • (Hydroxymethylene)diphosphonic acid
  • Phosphonic acid, (hydroxymethylene)bis-
  • Oxidronsaeure
  • Oxidronic acid (USAN)
  • Acidum oxidronicum
  • (Hydroxymethylen)diphosphonsaeure
  • (Hydroxymethylene)disphosphonic acid
  • hydroxymethane diphosphonate
  • 1,1-hydroxymethyldiphosphonate
  • methylenediphosphonic acid, hydroxy-
  • (Hydroxymethylene)bis(phosphonic acid)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
192.00 g/molcalc.
Exact mass
191.9589 Dacalc.
LogP (octanol/water)
-1.38calc.
Topological polar surface area
135.3 Ųcalc.
Hydrogen bond donors
5calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
2calc.
Heavy atoms
10calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Hydroxymethanediphosphonic acid suppliers

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Hydroxymethanediphosphonic acid price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Hydroxymethanediphosphonic acid is traded under.

HS 2931.49Indicative HS code

Non-halogenated organo-phosphorous derivatives, other

World exports in 2024
$3.44B
−6.5% vs 2023, imports $3.07B
2022 to 2024
Top exporters
  1. China54.9%
  2. United States25.4%
  3. Germany5.1%
Top importers
  1. United States20.9%
  2. Argentina14.9%
  3. Brazil14.3%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Hydroxymethanediphosphonic acid is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Hydroxymethanediphosphonic acid, based on the data on this page

What is Hydroxymethanediphosphonic acid?

Oxidronic acid is a 1,1-bis(phosphonic acid).

What is the CAS number of Hydroxymethanediphosphonic acid?

The CAS registry number of Hydroxymethanediphosphonic acid is 15468-10-7.

What is the molecular formula and weight of Hydroxymethanediphosphonic acid?

The molecular formula of Hydroxymethanediphosphonic acid is CH6O7P2 and its molar mass is 192.00 g/mol.

What is Hydroxymethanediphosphonic acid used for?

Known uses and roles of Hydroxymethanediphosphonic acid include scale inhibitors in water treatment and scale inhibitors in oil, gas and lubricants.

Is Hydroxymethanediphosphonic acid hazardous?

No GHS hazard classification for Hydroxymethanediphosphonic acid is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Hydroxymethanediphosphonic acid?

Hydroxymethanediphosphonic acid is usually classified under HS code 293149 (Non-halogenated organo-phosphorous derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hydroxymethanediphosphonic acid?

Post a free request on CompoundList and suppliers of Hydroxymethanediphosphonic acid will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Hydroxymethanediphosphonic acid?

Suppliers quote Hydroxymethanediphosphonic acid on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Hydroxymethanediphosphonic acid

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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