1.Hot selling high quality Pyrimidine / 1.3-Diazabenzene with best price CAS 289-95-2

1-9 Kilograms

$25.00

≥10 Kilograms

$24.90

  • Item No.TOP
    MOQ1 Kilogram / Kilograms
    description
    Product Description
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    Pyrimidine, also known as "m-diazabenzene", is a six-membered aromatic heterocyclic compound containing two meta-nitrogen atoms, which is an isomer with pyridazine and pyrazine. Molecular formula C4H4N2. The molecular weight is 80.09. A colorless liquid or solid crystal with a pungent odor. The melting point is 20 to 22 °C. The boiling point of 123 ~ 124 ° C. The refractive index is 1.4998 (20 ° C). Easy to water, ethanol, ether, weakly alkaline, can form a salt with acid, its basicity is weaker than pyridine, electrophilic substitution reaction is also more difficult than pyridine, only bromination reaction can occur in the 5-position, can not occur nitrification and sulfonation The reaction, but more prone to nucleophilic substitution. Pyrimidine derivatives are widely found in nature. For example, vitamin B1, uracil, cytosine, and thymine all contain a pyrimidine structure. Its picrate is yellow needle crystal. The temperature of 156 ° C. Due to the presence of a conjugated double bond in the pyrimidine, it has a strong absorption of ultraviolet light. It is obtained by oxidation of barbituric acid with phosphorus oxychloride and reduction with hydriodic acid.
    Nucleic acid contains three important pyrimidine derivatives, which are important bases in nucleic acids and play an important role in living organisms.
     
    Description & Specification
     Category Pharmaceutical Raw Materials, Fine Chemicals, Bulk drug
    StandardMedical standard
    Shelf life2 years
     Storage should be stored in a well-closed container at low temperature, keep away from moisture, heat and light.
    Test ItemStandard: USP 

    Identification

    IR spectrum similar to that of RS

    HPLC retention time similar to that of RS

    Related substance

    Total impurities: NMT0.3%

    Single impurity: NMT0.1%

     

    Packaging & Shipping

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    Company Information

    Qingdao Sigma Chemical Co., Ltd.is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.

    The aim of Qingdao Sigma Chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
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    FAQ

    Q1: Are you a manufacturer?
    Answer: Yes, we are factory founded on 2002.
     
    Q2: How to contact with us?
    Click the Alibaba "Contact Supplier" And then send us message the product you interest in, you will get reply within 24 hours.
     
    Q3:Which kind of payment terms do you accept?
    For small order,you can pay by T/T,Western Union or Paypal,nomal order by T/T to our company account
     
    Q4:Can you give me a discount price?
    Surely,It depend on your qty
     
    Q5:How can i get a sample?
    free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.
     
    Q6: How to confirm the Product Quality before placing orders?
    A:You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
     
    Q7:How do you treat quality complaint?
    A:First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.


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