SDS

Orthotolidine SDS
4
Use only outdoors or in a well ventilated area. Wear appropriate personal protective equipment. Do not
breathe mist or vapor. Do not get in eyes, on skin, or on clothing. When using, do not eat, drink or smoke.
Keep away from heat and other incompatibles. Avoid prolonged exposure. Wash skin thoroughly after
handling. For personal protective equipment, refer to section 8 of this SDS. Observe good industrial
hygiene practices. Label containers appropriately.
Conditions for Safe Storage including any incompatibilities: Store locked up. Store in a cool, dry place out
of direct sunlight. Store in original tightly closed container. Store in a well ventilated place. Store away
from incompatible materials (refer to section 10 of the SDS).
8. EXPOSURE CONTROLS/PERSONAL PROTECTION
Occupational Exposure Limits
Chemical Name ACGIH TLV OSHA PEL NIOS IDLH
Orthotolidine dihydrochlorous None Established
Hydrate (3,3-dimethylbenzidine
Dihydrochloride) CAS #612-82-8
Hydrochloric Acid CAS #7647-01-0 Ceiling 2 ppm Ceiling 5 ppm IDLH: 50 ppm
(7 mg/m
3
) Ceiling: 5 ppm
Ceiling: 7 ppm
Water CAS #7732-18-5 None Established
Biological Limit Values: No biological exposure limits noted for the ingredients.
Appropriate Engineering Controls: Good general ventilation (typically 10 air changes per hour) should be
used. Ventilation rates should be matched to conditions. If applicable, use process enclosures, local
exhaust ventilation or other engineering controls to maintain airborne levels below recommended
exposure limits. If exposure limits have not been established, maintain airborne levels to an acceptable
level. Eyewash facilities and emergency shower must be available when handling this product.
Individual Protective Measures such as Personal Protective Equipment:
Eye/Face Protection: Wear safety glasses with side shields (or goggles) and a face shield. Provide an
emergency eyewash fountain and quick-drench shower in the immediate work area.
Skin Protection:
Hand Protection: Wear appropriate chemical resistant gloves. Advice should be sought from glove
suppliers.
Other: Wear appropriate chemical resistant clothing.
Respiratory protection: In case of insufficient ventilation, wear suitable respiratory equipment. Use a
NIOSH/MSHA approved respirator if there is a risk of exposure to dust/fumes at levels exceeding the
exposure limits. Advice should be sought from respiratory protection suppliers
Thermal Hazards: When necessary, wear appropriate thermal protective clothing.
General Hygiene Considerations: Always observe good personal hygiene measures, such as washing after
handling the material and before eating, drinking, and/or smoking. Routinely wash work clothing and
protective equipment to remove contamination.