During peak shipping seasons, what is the typical lead time for booking Methacrylic Acid MAA, a dangerous good, from Chinese ports to Hamburg or Busan ports?

Is there a significant difference in color uptake between 99.0% industrial-grade PNA and 99.5%+ refined-grade PNA when synthesizing high-grade disperse dyes? What are the typical contents of common isomer impurities in PNA (such as 2-nitroaniline)? How do they affect the color of the final product?

If the received Methacrylic Acid MAA has partially polymerized (resulting in turbidity), what are the internationally accepted sampling, sealing, and independent third-party testing procedures?

Is there usually a correlation between the purity and dissolution rate of bright yellow crystals and dark yellow powder PNA?

Methacrylic Acid MAA is classified as a Class 8 corrosive substance. What specific UN packaging classification standards must the 200kg polyethylene drums or 1000L IBC drums used for it meet?

List the major chemical plants globally that can stably supply high-purity PNA and evaluate their supply stability in the Asia-Pacific region.

In large-scale Methacrylic Acid (MAA) transactions using 100% irrevocable letters of credit (L/C), how should shipment terms be set to prevent defaults due to production scheduling issues?

What are the solubility profiles of PNA in ethanol, diethyl ether, and strong inorganic acids? How to prepare a stable diazotization reaction solution?