Sodium cyanide cylinders dumped a few metres from where lorry ferrying them overturned in Kambembe, Rironi. [Kimaku Chege, Standard]

A toxic sodium cyanide spill in Kambembe, Kiambu has been contained following a multi-agency response, with the Ministry of Health confirming that the area is now safe for normal use.

The spill occurred after a truck transporting the chemical overturned at Rironi on the Nairobi-Nakuru highway on Saturday, July 20.

Public Health and Professional Standards Principle Secretary (PS) Mary Muriuki in a statement on Monday, July 22, said no cases of poisoning have been detected so far.

 “We remind the public that sodium cyanide is extremely toxic, and even small amounts of ingestion or inhalation can be fatal,” said Muriuki.

 She warned that immediate effects of exposure include headache, dizziness, shortness of breath, nausea and vomiting. Prolonged contact may lead to neurological damage, thyroid dysfunction, and cardiovascular problems.

The compound also poses dire environmental risks, such as degradation of aquatic ecosystems, leading to massive fish kills and death to aquatic life.

“Sodium cyanide can cause significant damage to aquatic ecosystems,” she added.

Muriuki said several containers of sodium cyanide went missing following the accident, raising concerns about health and environmental hazards.

 The Health Ministry and the National Environment Management Authority have now expressed concerns on the mishandling of the chemical.

According to Limuru Deputy County Commissioner, Charles Mukele, eight out of the twenty four missing containers have been recovered.

 “Individuals in possession of the missing chemicals are requested to surrender it to the personnel at the temporary station or call the emergency numbers provided for information on how to return it to the authorities,” she said.

The ministry has set up a temporary facility near Kambembe to assist victims.

Muriuki advised the public to use Personal Protective Equipment (PPE), ensure proper ventilation and implement effective spill containment procedures when handling the chemical.

Sodium cyanide, a white water-soluble substance, is meant for industrial use, including gold and silver mining.