Doctors at Kenyatta hospital said most of the victims were due to be discharged from hospital later in the evening.
Some of the victims suffered severe burns after the boutique caught fire and were rushed to hospital writhing in pain.
Victims bathed in blood from the injuries were helped into waiting police vehicles and ambulances as others who could barely walk were wheeled away for treatment.
Witnesses said he building immediately exploded into fire ball causing panic and a stampede among customers who were at the shop.
Several casualties were rushed to hospital with critical injuries by good samaritans as police attempted to seal-off the area. But uncunny looters too had their day as they took advantage of the confusion and carted away valuables from the shops.
The blast occurred at the building next to Mt Kenya University throwing business and studies into disarray.