1.Q: How does PTSA work as catalyst?
A: The coupling reaction of formaldehyde(FA) and methyl formate(MF) to form methyl glycolate(MG) and methyl methoxy actate(MMAc), catalyzed by P-Toluenesulfonic Acid as well as assisted by different kind of solvents or Ni-containing compounds, had been investigate. The results showed that when the reaction was carried out at 140 degree C, with a molar ratio of FA to MF of 0.65:1. Molar fraction of P-Toluenesulfonic Acid to total feedstock of 11.0% and reaction time of 3h, the yield of MG and MMAc was 31.1% and 17.1%, respectively. P-Toluene Aulfonic Acid catalyzed the coupling reaction by means of the synergistic catalysis of protonic acidity and soft basicity.
2.Q: Is PTBBA dangerous and how to code it for personal protection?
A: P-Tert-Butyl-Benzoic-Acid is toxic solid. Hazard Class: 6.1; UN number: 2811; Packing Group: III.
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
Ingestion: Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Inhalation: Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician: Treat symptomatically and supportively.
3.Q: What is the minimum order quantity?
A: Our MOQ is 500g as a sample delivery. Free sample would be available for our old customers.
4.Q: How do you ensure the quality and delivery?
A: Our products become popular with its excellent quality among our customers. If necessary, we would apply a third-part inspection, such as CIQ, SGS. In general, the delivery is within 21 days from orders confirmed.
5.Q: What payment terms do you accept?
A: T/T:100% T/T in advance; T/T in advance and balance against B/L copy
L/C:L/C at sight; L/C 60/90/120days