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Impurities and reference standards

alpha-Hydroxytrimethoprim

Also known as Trimethoprim impurity C, Trimethoprim impurity c (ep impurity), Trimethoprim EP Impurity C

CAS 29606-06-2Formula C14H18N4O4Molar mass 306.32 g/molEC 641-689-3
GHS signal word: Warning. Pictograms: Harmful or irritant
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alpha-Hydroxytrimethoprim chemical structure, C14H18N4O4, CAS 29606-06-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
29606-06-2
Formula
C14H18N4O4
Molar mass
306.32 g/mol
EC number
641-689-3
HS code
293359
Category
Impurities and reference standards

What is alpha-Hydroxytrimethoprim?

Plain description, key identifiers and synonyms

alpha-Hydroxytrimethoprim is a chemical substance with the molecular formula C14H18N4O4 and a molar mass of 306.32 g/mol. Its CAS registry number is 29606-06-2. The IUPAC name is (2,4-diaminopyrimidin-5-yl)-(3,4,5-trimethoxyphenyl)methanol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2,4-diaminopyrimidin-5-yl)-(3,4,5-trimethoxyphenyl)methanol
CAS number
29606-06-2
EC number
641-689-3
Molecular formula
C14H18N4O4
UNII
7439XP501F
MDL number
MFCD21363892
InChIKey
ZQRSRBQVQNNQKD-UHFFFAOYSA-N
InChI
InChI=1S/C14H18N4O4/c1-20-9-4-7(5-10(21-2)12(9)22-3)11(19)8-6-17-14(16)18-13(8)15/h4-6,11,19H,1-3H3,(H4,15,16,17,18)
SMILES (canonical and isomeric)
COC1=CC(=CC(=C1OC)OC)C(C2=CN=C(N=C2N)N)O

Synonyms

  • Trimethoprim impurity C
  • Trimethoprim impurity c (ep impurity)
  • Trimethoprim EP Impurity C
  • Ro 20-0657/000
  • (2,4-Diaminopyrimidin-5-yl)(3,4,5-trimethoxyphenyl)methanol
  • a-Hydroxy Trimethoprim (Impurity)
  • (2,4-diaminopyrimidin-5-yl)-(3,4,5-trimethoxyphenyl)methanol
  • (RS)-(2,4-Diaminopyrimidin-5-yl)(3,4,5-trimethoxyphenyl)methanol
  • alpha-Hydroxy Trimethoprim
  • 5-Pyrimidinemethanol, 2,4-diamino-alpha-(3,4,5-trimethoxyphenyl)-
  • Calpha-Hydroxytrimethoprom
  • 2,4-Diamino-alpha-(3,4,5-trimethoxyphenyl)-5-pyrimidinemethanol
  • alpha-Hydroxy Trimethoprim (Impurity)
  • (+/-)- alpha-(2,4-Diamino-5-pyrimidyl)-3,4,5-trimethoxybenzyl alcohol
  • Racemic alpha-(2,4-diamino-5-pyrimidyl)-3,4,5-trimethoxybenzyl alcohol
  • Trimethoprim Impurity C(Ca-Hydroxy-TMP)
  • (RS)-(2,4-Diaminopyrimidin-5-yl)(3,
  • Trimethoprim Impurity C (Ca-Hydroxy-TMP)
  • Trimethoprim Impurity 3 (Trimethoprim EP Impurity C)

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
306.32 g/molcalc.
Exact mass
306.1328 Dacalc.
LogP (octanol/water)
0.75calc.
Topological polar surface area
125.7 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
8calc.
Rotatable bonds
5calc.
Heavy atoms
22calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.29calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc(Cc2cncnc2)cc1

c1ccc(Cc2cncnc2)cc1

2 rings, 13 atoms, the 5-Benzylpyrimidine ring system.

375 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

alpha-Hydroxytrimethoprim suppliers

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alpha-Hydroxytrimethoprim price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

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 alpha-Hydroxytrimethoprim is traded under.

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about alpha-Hydroxytrimethoprim, based on the data on this page

What is alpha-Hydroxytrimethoprim?

alpha-Hydroxytrimethoprim is a chemical substance with the molecular formula C14H18N4O4 and a molar mass of 306.32 g/mol. Its CAS registry number is 29606-06-2. The IUPAC name is (2,4-diaminopyrimidin-5-yl)-(3,4,5-trimethoxyphenyl)methanol.

What is the CAS number of alpha-Hydroxytrimethoprim?

The CAS registry number of alpha-Hydroxytrimethoprim is 29606-06-2.

What is the molecular formula and weight of alpha-Hydroxytrimethoprim?

The molecular formula of alpha-Hydroxytrimethoprim is C14H18N4O4 and its molar mass is 306.32 g/mol.

Is alpha-Hydroxytrimethoprim hazardous?

alpha-Hydroxytrimethoprim carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of alpha-Hydroxytrimethoprim?

alpha-Hydroxytrimethoprim is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy alpha-Hydroxytrimethoprim?

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What is the price of alpha-Hydroxytrimethoprim?

Suppliers quote alpha-Hydroxytrimethoprim 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 alpha-Hydroxytrimethoprim

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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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