Product Name: Volumetric Flask Amber Model NO.: 1621A Type: Flat-Bottomed Flask Capacity: All Size Certification: CE, ISO Disposable: Disposable Trademark: rongtai Transport Package: Safe and Standard Export Package Specification: 10ml Origin: Jiangsu China HS Code: 7010902000 Product Description Borosilicate Glass entirely conforms to the international standard ISO3583, and is a new special borosilicate glass of excellent chemical and physical properties with a silica content of 80%. It is highly stable in structure and, as a result, has marked mechanical strength and very high resistance against chemical attacks. Further, due to its low linear coefficient of thermal expansion, this glass is capable of withstanding high thermal shock and possesses good moulding ability. It is an excellent material for making laboratory apparatus where external heating is necessary, intricate laboratory glassware and chemical equipments as well as pressure water meter glass.Principal Physical and Chemical Properties:SiO2 Content...>80%Strain Point...520º CAnnealing Point...560º CSoftening Point...820º CRefractive Index...1.47Light Transmission (2mm)...92%Elastic Modulus...67KNmm-2Tensile Strength...40-120Nmm-2Glass Stress Optical Coefficient...3.8*10-6mm2/NProcessing Temperature(104dpas)...1220º CLinear Coefficient of Expansion(20-300º C)...3.3*10-6K-1Density(20º C)...2.23gcm-1Specific Heat...0.9Jg-1K-1Thermal Conductivity...1.2Wm-1K-1Hydrolytic Resistance (ISO 719)...Grade 1Acid Resistance (ISO 195)...Grade 1Alkali Resistance (ISO 695)...Grade 2Thermal Shock Resistance Rod...6*30mm 300&ordRound bottom, long neckCode Capacity(ml) O. D of Bulb(mm) Height(mm) PackingRK14053 150 60 200 60PCS/cartonRK14054 250 81 270 48PCS/cartonRK14055 500 101 300 24PCS/cartonRK14056 1000 126 350 12PCS/carton