MedKoo Cat#: 146292 | Name: Pyriclor

Description:

WARNING: This product is for research use only, not for human or veterinary use.

Pyriclor is a selective herbicide used primarily in direct-seeded rice to control grassy weeds such as Echinochloa crus-galli. It works by inhibiting carotenoid biosynthesis, which leads to chlorophyll degradation and bleaching of weed foliage upon light exposure. This disruption ultimately causes plant death while maintaining crop safety. Pyriclor is typically applied in the early stages of weed development for optimal effectiveness.

Chemical Structure

Pyriclor
Pyriclor
CAS#1970-40-7

Theoretical Analysis

MedKoo Cat#: 146292

Name: Pyriclor

CAS#: 1970-40-7

Chemical Formula: C5H2Cl3NO

Exact Mass: 196.9202

Molecular Weight: 198.43

Elemental Analysis: C, 30.27; H, 1.02; Cl, 53.60; N, 7.06; O, 8.06

Price and Availability

This product is currently not in stock but may be available through custom synthesis. To ensure cost efficiency, the minimum order quantity is 1 gram. The estimated lead time is 2 to 4 months, with pricing dependent on the complexity of the synthesis (typically high for intricate chemistries). Quotes for quantities below 1 gram will not be provided. To request a quote, please click the button below. Note: If this product becomes available in stock in the future, pricing will be listed accordingly.
Bulk Inquiry
Related CAS #
No Data
Synonym
Pyriclor;
IUPAC/Chemical Name
2,3,5-trichloropyridin-4-ol
InChi Key
XTVIFVALDYTCLL-UHFFFAOYSA-N
InChi Code
1S/C5H2Cl3NO/c6-2-1-9-5(8)3(7)4(2)10/h1H,(H,9,10)
SMILES Code
OC1=C(Cl)C=NC(Cl)=C1Cl
Appearance
To be determined
Purity
>98% (or refer to the Certificate of Analysis)
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
Dry, dark and at 0 -4 C for short term (days to weeks) or -20 C for long term(months to years).
Solubility
To be determined
Shelf Life
>2 years if stored properly
Drug Formulation
To be determined
Stock Solution Storage
0 - 4 C for short term (days to weeks), or -20 C for long term (months).
HS Tariff Code
2934.99.9001
More Info

Preparing Stock Solutions

The following data is based on the product molecular weight 198.43 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
1: Burns ER, Buchanan GA, Carter MC. Inhibition of carotenoid synthesis as a mechanism of action of amitrole, dichlormate, and pyriclor. Plant Physiol. 1971 Jan;47(1):144-8. doi: 10.1104/pp.47.1.144. PMID: 16657570; PMCID: PMC365828.