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BP Standard White Powder Trimethoprim CAS 738-70-5 for veterinary use

Name: BP Standard White Powder Trimethoprim CAS 738-70-5 for veterinary use
Brand: Wuhan pnq
SKU: pr2603251252
Price: 10.2 USD
Availability: InStock

17 Inquiries

Unit Price:

$10.2-11.22/G FOB

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CAS No.:

738-70-5

Grade:

Chemical Grade

Content:

99%

Port:

shanghai

Brand:

Wuhan pnq

Packaging:

Aluminum foil bag

Price valid (until):

2026-06-25

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Wuhan Pnq Int Trade Co., Ltd

Company Type:

Trader

Location:

China

Qualification:

Main Products:

Apigenin,PQQ,NMNH

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Product Description
Seller Information
History Price
Inquiry History

Description

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Q1: What's your MOQ?

A:It depends on different products,we can accept sample order or provide free sample for your test.

Q2:How about delivery leadtime?

A:Delivery lead time: About 3-5 days after payment confirmed. (Chinese holiday not included)

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A:Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T or Bitcoin.

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A:First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.

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Description

Name	Trimethoprim
CAS number	738-70-5
EINECS number	212-006-2
Synonym	Proloprim; Trimethoprim (free base); Trimpex; 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine; methoxybenzyl aminopyrimidine; Trimethopim(TMP); TRIMETHOPRIM, CRYSTALLIZED; 5-(3,4,5-trimethoxybenzyl)pyrimidine-2,4-diyldiamine;
Description	Trimethoprim (TMP) is an antibiotic used mainly in the treatment of bladder infections. Trimethoprim binds to dihydrofolate reductase and inhibits the reduction of dihydrofolic acid (DHF) to tetrahydrofolic acid (THF). THF is an essential precursor in the thymidine synthesis pathway and interference with this pathway inhibits bacterial DNA synthesis. Trimethoprim's inhibitory activity for bacterial dihydrofolate reductase is sixty thousand times greater than for human dihydrofolate reductase. Sulfamethoxazole inhibits dihydropteroate synthase, an enzyme involved further upstream in the same pathway.
Structure	\
Molecular Formula	C14H18N4O3
Molecular Weight	290.32 g/mol
Appearance	Solid powder
Quality Standard	BP Standard
Assay	≥98%
Shipping Condition	Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.
Storage Condition	Store in cool place. Keep container tightly closed in a dry and well ventilated place.
Shelf Life	>2 years if stored properly
Sample package	Aluminium foil bag
Commercial package	Aluminium Tin, Fiber drum
Origin	China

Trimethoprim More Info

Trimethoprim is an antifolate antibacterial agent that selectively inhibits bacterial dihydrofolate reductase (DHFR), an essential enzyme responsible for converting dihydrofolic acid (DHF) to tetrahydrofolic acid (THF). THF is a critical precursor for the synthesis of bacterial nucleic acids and proteins, so inhibition of DHFR by trimethoprim disrupts DNA synthesis and bacterial replication, ultimately leading to bacteriostatic effects when used alone.
When combined with sulfamethoxazole, which inhibits an earlier step in folate synthesis (dihydropteroate synthase), trimethoprim exhibits synergistic and bactericidal activity by blocking two consecutive steps in the bacterial folate pathway.

Applications

Primarily used to treat acute uncomplicated urinary tract infections caused by susceptible bacteria such as Escherichia coli, Klebsiella pneumoniae, Enterobacter spp., Proteus mirabilis, and coagulase-negative Staphylococcus species.
Used in combination with sulfamethoxazole for a broader range of infections including acute otitis media in children, acute exacerbations of chronic bronchitis in adults, enteritis caused by Shigella, prophylaxis and treatment of Pneumocystis jiroveci pneumonia, and travelers’ diarrhea caused by enterotoxigenic E. coli.
Occasionally used as monotherapy for urinary tract infections and prophylaxis in certain clinical scenarios.

Basic Info

Product Name:

Trimethoprim

Other Name:

2,4-Pyrimidinediamine,5-[(3,4,5-trimethoxyphenyl)methyl]-;Pyrimidine,2,4-diamino-5-(3,4,5-trimethoxybenzyl)-;5-[(3,4,5-Trimethoxyphenyl)methyl]-2,4-pyrimidinediamine;BW 56-72;2,4-Diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine;Syraprim;Trimethoprim;NIH 204;2,4-Diamino-5-(3′,4′,5′-trimethoxybenzyl)pyrimidine;Trimethioprim;Trimetoprim;Triprim;Trimpex;Trimanyl;Instalac;Trimogal;Wellcoprim;Monotrim;Proloprim;Tiempe;Trimopan;Uretrim;NSC 106568;Infectotrimet

CAS No.:

738-70-5

Molecular Formula:

C14H18N4O3

InChIKeys:

InChIKey=IEDVJHCEMCRBQM-UHFFFAOYSA-N

Molecular Weight:

290.31800

Exact Mass:

290.32

EC Number:

212-006-2

UNII:

AN164J8Y0X

NSC Number:

757370|752719|106568

UN Number:

2811

DSSTox ID:

DTXSID3023712

NCI Thesaurus Code:

C908

Color/Form:

White to cream, crystalline powder

ATC Code:

J01EE01|J - Antiinfectives for systemic use

HScode:

2933599090

Categories:

Bulk Drug Intermediates

Characteristics

PSA:

105.51000

XLogP3:

0.9

Appearance:

Trimethoprim is an odorless white powder. Bitter taste. (NTP, 1992)

Density:

1.252 g/cm3

Melting Point:

199-203 °C

Boiling Point:

526ºC at 760 mmHg

Flash Point:

271.9ºC

Refractive Index:

1.600

Water Solubility:

<0.1 g/100 mL at 24 ºC

Storage Conditions:

2-8ºC

Toxicity:

LD50 orally in mice: 7000 mg/kg (Yamamoto)

Odor:

Odorless

Taste:

Bitter

PKA:

7.12(at 20 °C)

Dissociation Constants:

7.12 (at 20 °C)|pKa= 7.12 (conjugate acid)

Collision Cross Section:

170.8 Å² [M+H]+ [CCS Type: TW, Method: Major Mix IMS/Tof Calibration Kit (Waters)]|171.2 Å² [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine and drug standards]|172.89 Å² [M+H]+

Air and Water Reactions:

Insoluble in water.

Reactive Group:

Amines, Phosphines, and Pyridines

Reactivity Profile:

This compound readily forms salts with acids. (NTP, 1992).

See More Trimethoprim Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 4, Oral

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Warning
Hazard statement(s)	H302 Harmful if swallowed
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product.
Response	P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth.
Storage	none
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More Trimethoprim Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Apigenin,PQQ,NMNH

Location:
Room 1006, Building C6, Economic Development Wanda, Caidian District, Wuhan City, Hubei Province

Payment Terms:
100% TT in advance

Average lead Time:
30

Total Annual Revenue:
Less than $1 million

Total Employees:
5-10

Year of Establishment:
2021

Wuhan PNQ trade located in Wuhan, China, is an innovative natural products manufacturer and supplier that offers raw powders as dietary ingredients, food and beverage additives, sports nutrition supplements.
Weekly Price

 The chart shows the price trend of the product in the past 12 months.

Inquiry History

17 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	Trimethoprim	50 KG	Dec 16, 2025
India	Trimethoprim	25 KG	Sep 13, 2024
Ecuador	TRIMETOPRIM	25 KG	May 29, 2024
Pakistan	Trimethoprim	300 KG	Apr 8, 2024
Peru	Trimethoprim	2.00 MT	Nov 7, 2023
India	Trimethoprim	3000 KG	Oct 1, 2023
Paraguay	Doxycycline hyclata	150.00 KG	Sep 25, 2025
Paraguay	Chlorhexidine digluconate	400.00 KG	Sep 25, 2025
Paraguay	Praziquantel	100.00 KG	Sep 26, 2025
Paraguay	Benzidamine hidrochloride	500.00 KG	Sep 25, 2025
Paraguay	Choline chloride	200.00 KG	Sep 25, 2025
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Paraguay	Azepromacine maleate	10 KG	Sep 25, 2025
Paraguay	Tylosin tartrate	100.00 KG	Sep 26, 2025
Paraguay	Copper disodium EDTA	200.00 KG	Sep 26, 2025
Paraguay	Fipronil	800.00 KG	Sep 26, 2025
Paraguay	Dichloromethane	4000.00 KG	Sep 25, 2025

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BP Standard White Powder Trimethoprim CAS 738-70-5 for veterinary use

Product Description

Seller Information

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