ISOBUTYLENE

Hazardous Ingredients

CONCENTRATION C.A.S. % Ingredient Name T.L.V. LD/50 LC/50 25155- 10-30 SODIUM NOT 438 NOT 30-0 DODECYLBENZENESULFONATE AVAILABLE MG/KG AVAILABLE RAT ORAL 1330 MG/KG MOUSE ORAL Section 3 : PHYSICAL / CHEMICAL CHARACTERISTICS Physical state: Liquid.

Appearance/Odor

Odourless Pale yellow. Odor threshold (ppm): Not available. Vapour pressure @ 20°C (68°F). (mmHg): 17 Vapour density (air=1): >1 Volatiles (%) By volume: Not available. Evaporation rate < 1. (butyl acetate = 1): MS 01.40.01.03.04.0 msds_liquinox_english_osha Boiling point (°C): 100 (212F) Freezing point (°C): Not available. pH: 8.5 Specific gravity @ 20 °C: (water = 1). 1.083 Solubility in water (%): Complete. Coefficient of water\oil Not available. dist.: VOC: None Section 4 : FIRE AND EXPLOSION HAZARD DATA Flammability: Not flammable. Conditions of Surrounding fire. flammability: Extinguishing media: Carbon dioxide, dry chemical, foam. Water Water fog. Special procedures: Self-contained breathing apparatus required. Firefighters should wear the usual protective gear. Use water spray to cool fire exposed containers. Auto-ignition Not available. temperature: Flash point (°C), None method: Lower flammability Not applicable. limit (% vol): Upper flammability Not applicable. limit (% vol): Not available. Sensitivity to mechanical Not available. impact: Hazardous combustion Oxides of carbon (COx). products: Hydrocarbons. Rate of burning: Not available. Explosive power: Containers may rupture if exposed to heat or fire. Section 5 : REACTIVITY DATA Chemical stability: Product is stable under normal handling and storage conditions. Conditions of instability: Extreme temperatures. polymerization: Hazardous Will not occur. Incompatible Strong acids. substances: Strong oxidizing agents. decomposition products: Hazardous See hazardous combustion products.

Health hazards

DATA MS 01.40.01.03.04.0 msds_liquinox_english_osha

Principle Routes of Exposure

Skin contact, eye contact, inhalation and ingestion Effects of Acute Exposure Eye contact: May cause irritation. Skin contact: Prolonged and repeated contact may cause irritation. Inhalation: May cause headache and nausea. Ingestion: May cause vomiting and diarrhea. May cause gastric distress. Effects of chronic See effects of acute exposure. exposure: LD50 of product, species > 5000 mg/kg rat oral. & route: LC50 of product, species Not available. & route: Exposure limit of Not available. material: Sensitization to product: Not available. Carcinogenic effects: Not listed as a carcinogen. Reproductive effects: Not available.

Teratogenic Effects

Not available Mutagenicity: Not available. Synergistic materials: Not available. aggravated by exposure: Medical conditions Not available. First Aid Skin contact: Remove contaminated clothing. Wash thoroughly with soap and water. Seek medical attention if irritation persists. Eye contact: Check for and remove contact lenses. Flush eyes with clear, running water for 15 minutes while holding eyelids open: if irritation persists, consult a physician. Inhalation: Remove victim to fresh air. If irritation persists, seek medical attention. Ingestion: Do not induce vomiting, seek medical attention. Dilute with two glasses of water. Never give anything by mouth to an unconscious person. Section 7 : PRECAUTIONS FOR SAFE HANDLING AND USE Leak/Spill: Contain the spill. Prevent entry into drains, sewers, and other waterways. Wear appropriate protective equipment. Small amounts may be flushed to sewer with water. Soak up with an absorbent material. Place in appropriate container for disposal. Notify the appropriate authorities as required. Waste disposal: In accordance with local and federal regulations. Handling procedures and Protect against physical damage. equipment: Avoid breathing vapors/mists. Wear personal protective equipment appropriate to task. MS 01.40.01.03.04.0 msds_liquinox_english_osha Wash thoroughly after handling. Keep out of reach of children. Avoid contact with skin, eyes and clothing. Avoid extreme temperatures. Launder contaminated clothing prior to reuse. Storage requirements: Store away from incompatible materials. Keep containers closed when not in use. Section 8 : CONTROL MEASURES

Precautionary statements

Gloves/Type: Wear appropriate gloves. Respiratory/Type: None required under normal use. Eye/Type: Safety glasses recommended. Footwear/Type: Safety shoes per local regulations. Clothing/Type: As required to prevent skin contact. Other/Type: Eye wash facility should be in close proximity. Emergency shower should be in close proximity. requirements: Ventilation Local exhaust at points of emission. MS 01.40.01.03.04.0 ~ . ~ Telephone: 877-744-1126 c 3050 Spruce Street Saint Louis, MO, 63103 USA Fax: 800-325-5052 SIGMA-ALDRICH www .sigmaaldrich.com 00000644 03/19/2009 JACOBS ENGINEERING INC 4300 B ST I STE 600 ANCHORAGE AK 99503 USA Attached please find the Material Safety Data Sheets required for your recent order(s). Please note that we deliver MSDS documents to you for hazardous materials that you have not ordered previously, or if we have made significant changes to the MSDS content since your last order. In addition, you can access our complete MSDS library at www sigmaaldrjch com. You may contact the MSDS department at 877-744-1126 or via email at msdsrequest@sial.com if you have any questions or comments. Beginning in October 2006, we will be upgrading our computer system that produces MSDS documents. In addition to improving the overall look of our MSDS, the documents from our new system will feature improved data quality and increased regulatory data. We will be migrating our data to the new system for several months, and you will receive separate MSDS mailings from each system during this transition period. We will be sending you MSDS documents from the new system as you order those products, so that you may update your records accordingly. Please feel free to contact us with any questions or comments you may have during our.transition. Rpgulatacy Information· These MSDS documents are written in accordance with US OSHA Hazard Communication Standard 29 CFR 1910.1200. Certain mixtures or trade name products that are supplied by Sigma-Aldrich, Inc., contain a toxic chemical or chemicals subject to the notification requirements of Section 313 of Title Ill of the Superfund Amendments and Reauthorization Act of 1986 and 40 CFR Part c 372. This law requires certain manufacturers to report on annual emissions of specified toxic chemicals and chemical categories. Emergency Planning and Community Right-To-Know Information Hotline: (800) 424-9346 or (703) 412-9810. Please note that if you Please refer to Section 15 of the MSDS document to determine if a Sigma-Aldrich product contains any SARA listed materials. If you are unsure if you are subject to the reporting requirements of Section 313, or need more information, please call the EPA repackage, or otherwise redistribute, these products to industrial customers, a notice similar to this one should be sent to those customers. Additionally, this information must be permanently affixed to, and included with, all Material Safety Data Sheets that are copied and distributed for these substances. Delivery #'s: 0831733576 PO#: 05F522-P-009-0065 34966 METHANOL, LC-MS CHROMASOLV(R), > = 99.9% c -