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4-Aminosalicylic Acid (PAS)

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Product Description

Product Name: 4-Aminosalicylic Acid

Synonyms: 4-Amino-2-hydroxybenzoic acid; PAS 

CAS No.: 65-49-6
EC Number: 200-613-5 
Density: 1.3585 g/cm3,
Melting point: 135-145 ºC
Boiling point: 276.03 ºC (6 mmHg)
Molecular Weight: 153.14
Chemical Formula: C7H7NO3


扎金花可以强行开牌吗 4-aminosalicylic acid (pas) occurs as a white to yellowish white crystalline solid that darkens on exposure to light or air. it is slightly soluble in water but more soluble in alcohol. alkali metal salts and the nitric acid salt are soluble in water, but the salts of hydrochloric acid and sulfuric acid are not. the acid undergoes decarboxylation when heated. an aqueous solution has a ph of approximately 3.2. pas is administered orally in the form of the sodium salt, usually in tablet or capsule form. symptoms of gastrointestinal irritation are common with both the acid and the sodium salt. various enteric-coated dosage forms have been used in an attempt to overcome this disadvantage. other forms that are claimed to improve gastrointestinal tolerance include the calcium salt, the phenyl ester, and a combination with an anion exchange resin (rezi-pas). an antacid such as aluminum hydroxide is frequently prescribed. the oral absorption of pas is rapid and nearly complete, and it is widely distributed into most of the body fluids and tissues, with the exception of the csf, in which levels are significantly lower.it is excreted primarily in the urine as both unchanged drug and metabolites.

Applications

扎金花可以强行开牌吗 4-aminosalicylic acid, also known as para-aminosalicylic acid (pas) is an antibiotic primarily used to treat tuberculosis.specifically it is used to treat active drug resistant tuberculosis together with other antituberculosis medications. it has also been used as a second line agent to sulfasalazine in people with inflammatory bowel disease such as ulcerative colitis and crohn's disease. it is typically taken by mouth. it is on the world health organization's list of essential medicines, the most effective and safe medicines needed in a health system.

Specification


item

standard

appearance

扎金花可以强行开牌吗 white to yellowish free flowing solid crystals

Purity  98.5% Min

melting point

135 to 145°C

Residue on Ignition

0.2% Max.

M-aminophenol 0.25% Max.
Chloride(as Cl)
0.042% Max.
Moisture
 0.5% Max.
Heavy Metal 
30PPM Max.
PH Value
3.0-3.7
Packing & Storage

Package: 1kg Vacuum laminated aluminium foil bag/ 25kg fiber drum with PE bag liner or against customized  

Storage: stored in cool, dry, clean and well ventilated roofed warehouse with moisture-proof foundation. Avoid insolation or rain. 
Stored separately and kept away from poisonous substances and sources of ignition

Expiry Period: 2 Years



Contact

ZIBO PIONEER CHEMICAL TECHNOLOGY CO.,LTD.

add:no.181 xincun west road,zibo city, shandong province, p.r.china

tel/fax: 0086-533-3171219

Website: nueaj.icu

Mr. Conan WEI

mobile/whatsapp:0086-18653336026

skype:conan_wei@outlook.com

扎金花可以强行开牌吗 wechat:conan_wei  qq:108371800

Email:conan@zbpct.com,conanwei73@gmail.com

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