1185916-57-7 Usage
Description
NA, which stands for "not applicable," is a term used in a chemical context to indicate that a certain property or characteristic does not apply to a particular chemical. It can be employed in various situations to signify the absence of a specific attribute or the non-applicability of a certain standard or measurement. In some instances, "NA" may also refer to specific chemical compounds or substances with particular names or initials.
Usage:
Used in Chemical Context:
NA is used as an indicator for [the absence of a specific property or characteristic] in a chemical context, as it signifies that a certain standard or measurement does not apply to a particular chemical.
Used in Data Presentation:
In data presentation, NA is used as a placeholder to denote that a value or information is missing or not applicable for a given data point.
Used in Regulatory Compliance:
NA may be used in regulatory compliance documentation to indicate that a certain requirement or regulation does not apply to a specific chemical or substance.
Used in Research and Development:
In research and development, NA can be employed as a marker to signify that a particular experiment or test result is not relevant or does not apply to the chemical being studied.
Used in Quality Control:
In quality control processes, NA can be utilized to highlight that a certain quality standard or measurement is not applicable to a specific chemical or product.
Used in Educational Settings:
In educational settings, NA can be used to teach students about the limitations and exceptions in chemical properties and characteristics, emphasizing the importance of context and specificity in chemical studies.
Check Digit Verification of cas no
The CAS Registry Mumber 1185916-57-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,8,5,9,1 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1185916-57:
(9*1)+(8*1)+(7*8)+(6*5)+(5*9)+(4*1)+(3*6)+(2*5)+(1*7)=187
187 % 10 = 7
So 1185916-57-7 is a valid CAS Registry Number.
1185916-57-7Relevant articles and documents
Design, synthesis, and fungicidal activity of novel analogues of pyrrolnitrin
Wang, Ming-Zhong,Xu, Han,Feng, Qi,Wang, L.I.-Zhong,Wang, S.U.-Hua,Li, Zheng-Ming
experimental part, p. 7912 - 7918 (2010/09/03)
A series of novel analogues of pyrrolnitrin containing a thiophene moiety were designed and synthesized by a facile method, and their structures were characterized by 1H nuclear magnetic resonance (NMR) and high-resolution mass spectrometry. The isomers IV-h and V-h were isolated, and their structures were identified by 2D NMR, including heteronuclear multiple-quantum coherence (HMQC), heteronuclear multiple-bond correlation (HMBC), and nuclear Overhauser effect spectrometry (NOESY) spectra. Their fungicidal activities against five fungi were evaluated, and the results indicated that some of the title compounds showed excellent fungicidal activities in vitro against Alternaria solani, Gibberella zeae, Physalospora piricola, Fusarium omysporum, and Cercospora arachidicola at the dosage of 50 μg mL-1. Some compounds shown moderate activity at low dosage. Compound V-h could be considered as a leading structure for further design of agricultural fungicides.
