Ucarcid

Product Information

UCARCIDE SB 130 Antimicrobial
CAS Reg. No. 111-30-8 EPA Reg. No. 464-718 General The UCARCIDE™ family of oilfield antimicrobials are glutaraldehyde-based biocides which have found widespread use in a variety of oil and gas operations. The Dow Chemical Company offers several different UCARCIDE Antimicrobial formulations that are ideally suited to meet the diverse demands ofmost oil and gas applications. Until now, all of the UCARCIDE products were aqueous solutions of glutaraldehyde; however, UCARCIDE SB 130 Antimicrobial is a granular form of glutaraldehyde that was developed for those customers who prefer to handle solid products.
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Structure

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Physical Properties

The following are typical properties of UCARCIDE SB 130 Antimicrobial; they arenot to be considered product specifications. Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Opaque, white granular powder Active, % Glutaraldehyde (% by weight) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 pH @ 25°C: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1to 4.5 Solubility in Water @ 20°C: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Bulk Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70g/100 mL Vapor Pressure @ 20°C: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1 Torr

Features andBenefits

UCARCIDE SB 130 Antimicrobial is a free flowing, granular product that releases glutaraldehyde when added into an aqueous system. It contains approximately 30% glutaraldehyde, 30% water and 40% non-dusting (amorphous hydrated) silica that will not dissolve in water. As such, this product is ideal for uses in those applications that can tolerate the presence of an insoluble material, suchas drilling and fracturing fluids. The product is packaged in a reclosable container for ease of handling and use. UCARCIDE SB 130 Antimicrobial provides all of the benefits that are expected of a glutaraldehyde-based biocide, but now in a granular form for those who would rather handle a solid product. An important aspect of the new granular product is how fast the glutaraldehyde releases fromthe silica carrier when it is added into water. In order to determine this, a sample of UCARCIDE SB 130 Antimicrobial was added into water in such amount as to yield 100 ppm of active glutaraldehyde. The solution was stirred and aliquots were taken and analyzed for glutaraldehyde content by gas chromatography. The following graph shows the rate of release of glutaraldehyde into the water.

TheRate of Release of Glutaraldehyde

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Form No. 253-01534-10/06/03

ppm Glutaraldehyde Released

Release of Glutaraldehyde from UCARCIDE SB 130 Antimicrobial

100

80

ppm GA

60

40

20

0 0 20 40 60 80 100 120 140 Time (Minutes)

The graph shows that over 80% of the glutaraldehyde is released off of the silica carrier within 5 minutes of contact with the water. Allof the glutaraldehyde is subsequently released within 30 minutes of being placed in the water. This demonstrates that the silica does not bind the glutaraldehyde in such a way as to prevent its release in an aqueous system. Efficacy of Solid Glutaraldehyde Versus Liquid Glutaraldehyde Knowing that glutaraldehyde is quickly released from the silica carrier, the next step was to ensure thatglutaraldehyde released from the solid demonstrated the same efficacy as the liquid glutaraldehyde. To do so, a comparative efficacy study of both products was run in water collected from a nearby pond. This particular surface water was chosen to test the efficacy of the solid glutaraldehyde product in order to simulate the conditions and type of water that may be encountered in the field (to formulate...