1-METHYLURIC ACID Property

Melting point:

>325°C

Boiling point:

315.51°C (rough estimate)

Density 

1.5283 (rough estimate)

refractive index 

1.6500 (estimate)

storage temp. 

Refrigerator

solubility 

Aqueous Base (Slightly, Heated), DMSO (Slightly, Heated, Sonicated)

form 

Solid

pka

5.60±0.50(Predicted)

color 

Pale Yellow to Pale Brown

Water Solubility 

1.585g/L(temperature not stated)

BRN 

195190

Safety

WGK Germany 

3

HS Code 

29242990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P330Rinse mouth.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

1-METHYLURIC ACID Chemical Properties,Usage,Production

Chemical Properties

White to Off-White Solid

Uses

1-Methyluric acid, a metabolite of Theophylline, has been used:
for the determination of uric acid in stool samples by liquid chromatography and tandem mass spectrometry
in turbidimetric assay of synthetic urine samples
as a substrate for CYP1A2(cytochrome P450 family 1 subfamily A member 2) assay

Definition

ChEBI: An oxopurine that is 7,9-dihydro-1H-purine-2,6,8(3H)-trione substituted by a methyl group at N-1. It is one of the metabolites of caffeine found in human urine.

Biochem/physiol Actions

1-Methyluric acid (1-U) is a major metabolite of caffeine and theophylline with antioxidant activity that protects molecules such as low density lipoproteins (LDL) from oxidative modifications. 1-Methyluric acid may be used in studies aimed at differentiating the activities of caffeine and theophylline metabolites.

Purification Methods

Recrystallise it from H2O. Its solubility at 17.5o is 1g in 353mL of H2O. [Bergmann & Dikstein J Am Chem Soc 77 691 1955.] It has UV: max at 231 and 283nm (pH 3), and 217.5 and 292.5nm (pH >12) [Johnson Biochem J 5 133 1952]. [Beilstein 26 II 299, 26 III/IV 2621.]