- Butter yellow
- Methyl yellow
Yellow crystal leaflets.
For determination of free hydrochloric acid in gastric juice, spot test identification of peroxidized fats, ph indicator (red 2.9, Yellow 4.0).
Registry Numbers and Inventories.
R 25 40
S 36/37 45
Tumorigen; Mutagen; Reproductive Effector
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
113 - 117
Boiling point, °C
Vapor pressure, mmHg
1E-5 (25 C)
Vapor density (air=1)
Solubility in water
Partition coefficient, pKow
Heat of vaporization
Heat of combustion
Hazards and Protection.
Store in a cool, dry, well-ventilated area away from incompatible substances. Poison room locked. Keep containers tightly closed.
Wash thoroughly after handling. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale.
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation. Do not get water inside containers. Cover with dry earth, dry sand, or other non-combustible material followed with plastic sheet to minimize spreading and contact with water. Stop leak only if you can do so without risk.
Stable under normal temperatures and pressures.
Acids - acid anhydrides - oxidizing agents.
Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Substance is noncombustible. Decomposes at high temperatures, resulting in toxic and corrosive products. Containers may explode when heated. Extinguishing media: Do NOT get water inside containers. Do NOT use straight streams of water. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use water spray, fog or regular foam. Cool containers with flooding quantities of water until well after fire is out.
This material is probably combustible.
Fire may produce irritating, corrosive and/or toxic gases.
NIOSH REL: Ca See Appendix A OSHA PEL: [1910.1015] See Appendix B
O, I-2B, N-2, CP65
The toxological properties of this substance have not been fully investigated.
Harmful if swallowed. May cause digestive tract disturbances.
May cause respiratory tract irritation.
May cause severe skin irritation.
Contact with eyes may cause severe irritation, and possible eye burns.
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Remove contaminated clothing and shoes.
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
I; II; III
USCG CHRIS Code
2927 00 00