MATERIAL SAFETY DATA SHEET

 

SECTION I – MATERIAL IDENTIFICATION AND USE

Controlled Product  Yes o    NO x

Material Name

Hydrogen Sulfide in Methane Simulant

Product Identification No

MH-105, MH-620 and MCA-302

Manufacturer’s Name

Bascom-Turner Instruments, Inc.

Supplier’s Name

Bascom-Turner Instruments, Inc.

Street Address

111 Downey Street

Street Address

111 Downey Street

City, State, Zip Code

Norwood, MA 02062

City, State, Zip Code

Norwood, MA 02062

Emergency Tel. No.

781-769-9660

Emergency Tel. No.

781-769-9660

Chemical Name

Hydrogen Sulfide and Helium and Nitrogen

Chemical Family

Inorganic gas

Chemical Formula

H2S + He + N2

Molecular Weight

Helium: 4.0    Nitrogen: 28     Hydrogen Sulfide: 34

Trade Name & Synonyms

N/A

Material Use

Calibration gas

SECTION II – HAZARDOUS INGREDIENTS OF MATERIAL

Hazardous Ingredients

Approximate Concentration %

C.A.S. N.A. or

U.N. Numbers

“Exposure limits”

LD50/LC50

Specify Species and Route

 

Helium

 

Nitrogen

 

 

Hydrogen Sulfide

 

 

 

31%

 

69%

 

 

25 ppm

 

7440-59-7

 

7727-37-9

 

 

7783-06-4

 

ACGIH – TLV: simple asphyxiant

ACGIH – TLV: simple

asphyxiant

 

20 ppm C OSHA-PEL

10 ppm TWA ACGIH

15 ppm STEL ACGIH

 

N/A

 

N/A

 

 

LC50 712 ppm/1hr. Rat Inhalation

SECTION III – PHYSICAL DATA FOR MATERIAL

Physical State

Gas x   Liquid o   Solid o

Odor & Appearance

Colorless gas with rotten egg odor

Odor Threshold (ppm)

N.D.

Specific Gravity

N.D.

Vapor Pressure (mm)

Helium: 1719 mmHg @ -269 oC

Vapor Density (Air =  1)

Helium: 0.138

Nitrogen: 0.906

Evaporation Rate

N/A

Boiling Point (oC)

Helium: -269 oC

Nitrogen: -195.8 oC

Freezing Point (oC)

Helium: -272 oC @ 26 atm. Nitrogen: -210 oC

Solubility in Water (20oC)

Helium: 0.94% @ 0 oC

Nitrogen: 0.023 vol/vol

Hydrogen Sulfide: slight

% Volatile (by volume)

100%

pH

N/A

 

Coefficient of Water/Oil Distribution: N.D.

 

SECTION IV – FIRE AND EXPLOSION HAZARD OF MATERIAL

Flammability  

Yes o   No x

If yes, under

which conditions:  Negligible fire hazard.  Containers may rupture or explode if exposed to heat.

Means of Extinction

N/A

Special Procedures

Move container from fire area if it can be done without risk.  Cool containers with water spray until well after the fire is out.  Stay away from the ends of tanks.  Withdraw immediately in case of rising sound from venting safety device or any discoloration of tanks due to fire.

 

Flashpoint (oC) and Method

N/A

Upper Explosion Limit (% by volume)

N/A

Lower Explosion Limit (% by volume)

N/A

Auto Ignition Temp. (oC)

N/A

 

Hazardous Combustion Products

N/A

Explosion Data

Sensitivity to Mechanical Impact: N/A

Rate of Burning

N/A

Explosion Power

N/A

Sensitivity to Static Discharge: N/A

 

SECTION V – REACTIVITY DATA

Chemical Stability

Yes x   No o

If no, under

which conditions?  Life time of this gas as a calibration gas for hydrogen sulfide sensors is 1 year.

Incompatibility to other substances

Yes X   No o

If so,

Which ones?  Titanium will burn in nitrogen the main component of this product.

Reactivity and under what conditions

 

Cylinders exposed to high temperatures or direct flame can rupture.  Contact of the gas with non-stainless steel regulator parts may cause corrosion of these parts of the regulator.

Hazardous Decomposition Products

 

N/A

 

Material

Name/Identifier: Hydrogen Sulfide in Methane Simulant

 

SECTION VI – TOXICOLOGICAL PROPERTIES OF PRODUCT

Route of Entry o

Skin Contact o

Skin Absorption  x

Eye Contact x

Inhalation Acute x

Inhalation Chronic o

Ingestion o

Effects of Acute Exposure to Product

Inhalation can result in nausea, vomiting, dizziness, tingling sensation, suffocation, convulsions, and coma due to lack of oxygen.

Effects of Chronic Exposure to Product: Eye Effects: Repeated exposure to low concentrations is reported to cause conjunctivitis, photophobia, tears, pain, and blurred vision.  Edema has been reported following exposure to concentrations of hydrogen sulfide as low as 50 ppm which is twice the concentration of this product.

LD50 of Product (specify species & route)

H2S: 712 ppm/1hr. Rat Inhalation

Irritancy of Product

H2S is an irritant of the skip and eyes.

Exposure Limits of Product

H2S: 20 ppm C OSHA-PEL

H2S: 10 ppm TWA ACGIH

H2S: 15 ppm STEL ACGIH

LC50 of Product (specify species)

H2S: 712 ppm/1hr. Rat Inhalation

Sensitization of Product

N.D.

Synergistic Materials

N.D.

o Carcinogenicity

 

o Reproductive Effects

o Teratogenicity

X  Mutagenicity

SECTION VII– PREVENTIVE MEASURES

Personal Protective Equipment

 

Gloves (specify): N/A

 

Respiratory (specify):

Not required with normal use.

Eye (specify):

Safety glasses.  Do not wear contact lens.

Footwear (specify): N/A

Clothing (specify): N/A

Other (specify)

 

Engineering Controls (e.g., ventilation, enclosed process, specify)

Use local exhaust ventilation to reduce concentrations to within current exposure limits.

Leak & Spill Procedure:  Due to the small size and content of the cylinders (e.g. 105 liters or 620 liters of gas), an accidental release of this product presents significantly less risk of an oxygen deficient environment and other safety hazards than a similar release from a larger cylinder.

Waste Disposal:  Once the cylinders are relieved of pressure (empty) they are not considered hazardous material or waste.  It is acceptable to place empty cylinders in a landfill if local laws permit.

Handling Procedures & Equipment:  Cylinders should be firmly secured to prevent falling or being knocked-over.

 

Storage Requirements:  Cylinders must be protected from the environment, and preferably kept at room temperature.  Cylinders should be stored in dry well ventilated areas, away from sources of heat, ignition, and direct sunlight.  Protect cylinders against physical damage.

Special Shipping Information:  This material is hazardous as defined by 49 CFR 172.101 by the U. Department of Transportation.  Shipping name: Rare Gases and Nitrogen Mixtures, Compressed.  Hazard class: 2.2 (Non-Flammable Gas).  UN identification number: UN 1981.  DOT Label required:  Non-Flammable Gas.

 

SECTION VIII– FIRST AID MEASURES

Skin

N/A

Eye

N/A

Inhalation:  No unusual health effects are anticipated after exposure to this product, due to the small cylinder size.  If any adverse symptom develops after over-exposure to this product, remove victim(s) to fresh air as quickly as possible.  Only trained personnel should administer supplemental oxygen and/or cardio-pulmonary resuscitation if necessary.

Ingestion

N/A

General Advice:  Victim(s) who experience any adverse effect after over-exposure to this product must be taken for medical attention.  Take a copy of the label and MSDS to physician or other health professional with victim(s).

SECTION IX – PREPARATION DATE OF M.S.D.S.

Additional Information

 

Sources Used

Matheson Tri-Gas MSDS of Helium and BOC Gases MSDS of Helium in Nitrogen Mixtures and BOC Gases MSDS of Hydrogen Sulfide in Nitrogen Mixtures

Prepared by:

Dennis N. Crouse

Phone No.

781-769-9660

Date

12/5/05

 

                                   N/A – Not Applicable                                  N.D. – Not Determined                    C – Ceiling Level