The 4-Methoxyphenol powder is a white flake or waxy crystal. It is mainly used as a polymerization inhibitor of vinyl plastic monomers, ultraviolet inhibitor, dye intermediate, and antioxidant BHA for the synthesis of edible oils and cosmetics. Its biggest advantage is that the monomer added with MEHQ does not need to be removed when copolymerizing with other monomers, and can be directly copolymerized. It can also be used as antioxidant an antioxidant.
| Molecular formula |
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Item |
Specification |
Results |
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Appearance |
White to pale yellow crystalline powder,Slight smell |
Complies |
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Identification |
1. In the recorded chromatogram, the retention time of the main peak of the test solution is the same as that of the reference solution. |
Complies |
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Assay |
≥94.0% (Calculated on anhydrous substance) |
Complies |
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Heavy Metals |
≤0.0010% |
Complies |
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PH |
2.5~4.5 |
3.4 |
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E-isomer |
≤ 0.8% |
0.4% |
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Water Content |
≤2.0% |
1.5% |
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Absorbance |
570~610 |
608 |
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Absorption coefficient |
570 ~ 610 |
594 |
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Specific Rotation |
-58°~ -66° |
-65° |
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Crystallinity |
Complies |
Complies |
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Total Impurities |
≤3.0% |
2.4% |
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Relevant substances |
Impurity A(RRT:0.14) |
≤0.2% |
0.12% |
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Impurity B(RRT:0.29) |
≤0.2% |
Not detected |
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Residue of ignition |
≤0.2% |
0.1% |
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A new type of highly effective polymerization inhibitor -- p-hydroxyanisole
In order to avoid polymerization of olefinic monomers during storage and transportation, a small amount of polymerization inhibitor is often added to the monomers and removed before use. As an industrial auxiliary, polymerization inhibitor molecules react with chain radicals after use to form non-radical substances or low active radicals that cannot be initiated, thus terminating polymerization. As an excellent polymerization inhibitor, 4-Methoxyphenol Powder has the best solubility in organic solvents and the lightest color. P-hydroxyanisole (HQMME) can give the resin good storage stability, and will not delay or affect the gelation time of the resin when it is used.
Is p-hydroxyanisole more toxic than hydroquinone?
Hydroquinone is highly toxic. If adults take 1g by mistake, they will have headaches, dizziness, tinnitus, pale complexion, and other symptoms. It is flammable in case of an open fire and high heat. The chemical reaction can occur when contacting strong oxidants. It is decomposed by high heat to release toxic gas.
The toxicity of 4-Methoxyphenol powder to the human body is very low, and its toxicity is an intermediate hazard. It is stable under normal temperature and pressure, and combustible in case of an open fire; It will release spicy and irritating smoke, irritate eyes, and hurt skin if touched carelessly.
Antioxidant knowledge
Antioxidants are substances that prevent the adverse effects of oxygen. It is a kind of substance that can help capture and neutralize free radicals, so as to eliminate the damage of free radicals to the human body.
Antioxidants can prevent or delay the oxidation of food and cosmetics, improve the stability of products and prolong the storage time. When antioxidants are used correctly, they can not only prolong the storage life and shelf life of food, bring good economic benefits to producers and consumers, but also bring better food safety to consumers.
A variety of shipping methods for you to choose
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Transportation Time |
Shipping method |
Cargo weight requirements |
Advantage |
|
3-7 days |
DHL,Germany DHL,Germany DPD, |
Suitable for under 50kg. |
We have warehouses in Germany and California, USA, |
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7-15 days |
By Air |
Suitable for more than 50kg. |
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15-60 days |
By Sea |
Suitable for more than 500kg. |
Our strengths:
Our company has passed FDA and ISO19001 quality management system certification. And we have internal cooperation agreements with multiple factories and laboratories in China,Our company can provide 4-Methoxyphenol powder etc. at a more favorable price. If you are interested, please leave a message.
We not only have unique advantages in transportation, but also support multiple payment methods, whether you use US dollars, euros, Australian dollars, or local currencies from Singapore, Malaysia, Thailand, and so on. We can also support local currencies in these regions and countries. In addition, we also support bank cards (credit cards, etc.) for payments.
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