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Material Safety Data Sheet, Ashland Biosperse 257, May 1998

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Material Safety Data Sheet for Ashland Biosperse 257 microbicide listing tris(hydroxymethyl)nitromethane and formaldehyde.

NYC-WTC_000169058–000169064

Folder label: “7 World Trade Center Blue Prints Haz Mat Info Fire Reports Fire Prevention Records”

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NYC 9/11 Public Portal Document

MATERIAL SAFETY DATA SHEET Ashland Chemical Co. Page 004 Date Prepared: 01/21/98 Date Printed: 05/15/98 MSDS No: 306.0220578-006.002 BIOSPERSE 257 MICROBIOCIDE

Skin Protection Wear resistant gloves such as: natural rubber. Respiratory Protections If overexposure has been determined or documented, a NIOSH/MSHA jointly approved air supplied respirator is advised in absence of proper environmental control. OSHA regulations also permit other NIOSH/MSHA respirators under specified conditions. (See your safety equipment supplier.) Engineering or administrative controls should be implemented to reduce exposure. Engineering Controls Provide sufficient mechanical (general and/or local exhaust) ventilation to maintain exposure below level of overexposure (from known, suspected or apparent adverse effects). Exposure Guidelines Component

TRIS(HYDROXYMETHYL)NITROMETHANE (126-11-4) No exposure limits established FORMALDEHYDE (50-00-0) OSHA VPEL 0-750 ppm - TWA OSHA VPEL 2.000 ppm - STEL ACGIH TLV 0.300 ppm - Ceiling

9. PHYSICAL AND CHEMICAL PROPERTIES Boiling Point (for component) 212.0 F (100.0 C) @ 760 mmHg Vapor Pressure (for component) 17.500 mmHg @ 68.00 F Specific Vapor Density Mot applicable Specific Gravity 1.107 (3 77.00 F Liquid Density 9.210 Ibs/gal @ 77.00 F 1.107 kg/l @ 25.00 C Percent Volatiles 70.0 85.0 % Evaporation Rate SLOWER THAN ETHYL ETHER Appearance No data

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NYC-WTC_000169061Source: NYC Law Department, mirrored locally

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